data analytics mcq with answers pdf

Each question or group of questions is based on a passage or set of conditions, and the candidate has to select the best answer … (C) Shuffle. We know that confidence interval depends on the standard deviation of the data. USA - United States of America  Canada  United Kingdom  Australia  New Zealand  South America  Brazil  Portugal  Netherland  South Africa  Ethiopia  Zambia  Singapore  Malaysia  India  China  UAE - Saudi Arabia  Qatar  Oman  Kuwait  Bahrain  Dubai  Israil  England  Scotland  Norway  Ireland  Denmark  France  Spain  Poland  and many more.... © 2019 Copyright Quiz Forum. A) Mean is greater than 50 27) Which of the graph below has very strong positive correlation? 41) [True or False] Pearson captures how linearly dependent two variables are whereas Spearman captures the monotonic behaviour of the relation between the variables. 10. The R square always increases or at least remains constant because in case of ordinary least squares the sum of square error never increases by adding more variables to the model. MCQ quiz on Data Science multiple choice questions and answers on data science MCQ questions quiz on data science objectives questions with answer test pdf. C) Prediction Therefore it will have the highest standard deviation. Click Here for Answers 1 – C / 2 – D / 3 – A / 4 – A / 5 – D / 6 – A / 7 – C / 8 – B / 9 – A / 10 – D Multiple Choice Questions of Computer Networking 3-1. The coefficient of determination is the R squared value and it tells us the amount of variability of the dependent variable explained by the independent variable. Hence, curve 1 has the least standard deviation. In this Data Science Interview Questions blog, I will introduce you to the most frequently asked questions on Data Science, Analytics and Machine Learning interviews. When we have the actual population data we can directly divide the sum of squared differences with n instead of n-1. 2. For Question 4.) 2) https://www.analyticsvidhya.com/blog/2015/11/7-watch-documentaries-statistics-machine-learning/ Commonly used Machine Learning Algorithms (with Python and R Codes), 40 Questions to test a data scientist on Machine Learning [Solution: SkillPower – Machine Learning, DataFest 2017], Introductory guide on Linear Programming for (aspiring) data scientists, 6 Easy Steps to Learn Naive Bayes Algorithm with codes in Python and R, 30 Questions to test a data scientist on K-Nearest Neighbors (kNN) Algorithm, 16 Key Questions You Should Answer Before Transitioning into Data Science. The spearman evaluates a monotonic relationship. 14) [True or False] The standard normal curve is symmetric about 0 and the total area under it is 1. B) Significance level = 1- Confidence level Answer choices. The researcher is not making an error. This is a two tailed test. _________ hides the limitations of Java behind a powerful and concise Clojure API for Cascading. DATA MINING Multiple Choice Questions and Answers :-1. Data … Common cohorts include. 33) What happens when we introduce more variables to a linear regression model? So here we were talking about memory improvement and not memory impact hence, then null hypothesis should say that listening music will not improve memory. F statistic is the value we receive when we run an ANOVA test on different groups to understand the differences between them. This set of Multiple Choice Questions & Answers (MCQs) focuses on “Big-Data”. Since the differences are squared, added and then rooted, negative standard deviations are not possible. B) +/- 1.96 A relationship is linear when a change in one variable is associated with a proportional change in the other variable. __________ can best be described as a programming model used to develop Hadoop-based applications that can process massive amounts of data, 5. 7. Hence it is symmetric. D) None of the above. If a constant value is added or subtracted to either variable, the correlation coefficient would be unchanged. 19) What happens to the confidence interval when we introduce some outliers to the data? C) 30 We want to calculate if there is a significant difference in the scores of both the groups. ... For what is the ‘variable view’ in IBM SPSS’s data editor used? 1. B) 130 www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Sound knowledge of statistics can help an analyst to make sound business decisions. 9. After a 20 minutes lecture of both groups, a test is conducted for all the students. B)Listening to music significantly improves memory at p. C) The information is insufficient for any conclusion. So in 21 you would need to calculate the probablity of the sample mean being the population mean after the intervention. 1) https://www.analyticsvidhya.com/blog/2017/01/comprehensive-practical-guide-inferential-statistics-data-science/ Here the null hypothesis is that music does not improve memory. C) The mean score for the sample after the experiment (i.e With music) is 28. The null hypothesis in this case would be that there is no difference between the groups, while the alternate hypothesis would be that the groups are significantly different. Now, he is considering to recommend all his patients to go on a diet. Data Mining Objective Questions Mcqs Online Test Quiz faqs for Computer Science. You can access the final scores here. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. The adjusted R-squared increases only if the new term improves the model more than would be expected by chance. Input to the _______ is the sorted output of the mappers. The number of values less than 25 are (36+54+69 = 159) and the number of values greater than 30 are (55+43+25+22+17= 162). 38) The line described by the linear regression equation (OLS) attempts to ____ ? Hence, there is no change in the correlation coefficient. The bias is definitely reduced as the standard deviation will now(after correction) be depicting the dispersion of the population more than that of the sample. If we know the value of the slope then by using which option can we always find the value of the intercept? As we can see for a positively skewed curve, Mode0.99. This Big Data Analytics Online Test is helpful to learn the various questions and answers. B) Decrease We use these measures to find the central value of the data to summarize the entire data set. The mean, median, mode are the three statistical measures which help us to analyze the central tendency of data. The formula for R2 given by. Big Data Hadoop Multiple Choice Questions and Answers MCQ quiz on Big Data Hadoop MCQ multiple choice questions and answers, objective type question and answer on hadoop quiz questions with answers test pdf … Developed by, Big Data Hadoop Objective Questions and Answer. B) The r squared may increase or decrease while the adjusted r squared always increases. It is easy to understand if we look at the formula for calculating the correlation. (B) Mapper. C) Listening to music while studying may improve memory. B) The coefficient of determination is the coefficient of correlation squared True, C) The coefficient of determination is the square root of the coefficient of correlation False. Then the average value of this absolute error would be the mean absolute error. 1) Which of these measures are used to analyze the central tendency of data? Data Structures MCQs is an important part of Some IT companies Written Exams (Capgemini, Tech Mahindra, Infosys etc.) D). Explanation are given for understanding. The z critical value for a 2 tailed test would be ±2.58. CL = 1 – (2*alpha) for two tailed. 5) Below, we have represented six data points on a scale where vertical lines on scale represent unit. A couple more articles for your reference – Type 1 error would be that we reject it and say that music does improve memory when it actually doesn’t. E) None of the above. 15) What is the null hypothesis in this case? Data Mining Multiple Choice Questions and Answers Pdf Free Download for Freshers Experienced CSE IT Students. Have you ever created or worked with statistical models? How To Have a Career in Data Science (Business Analytics)? F) Both B and D. Below are the distributions for Negatively, Positively and no skewed curves. Big Data Solved MCQ. It’s basically done when we’re trying to estimate the population standard deviation using the sample standard deviation. I could not understand 21 please could you explain it!! Entering data. 3. Contrary to the popular belief Bessel’s correction should not be always done. D) 150 Since 120 will be the same in both cases and will go off in the difference. If we add a constant value to all the values of x, the xi and  will change by the same number, and the differences will remain the same. Significance level is 1-confidence interval. The t statistic of the given group is nothing but the difference between the group means by the standard error. The % variability in scores is given by the R2 value. Which of the following is a MAE (Mean Absolute Error) for this linear model? A) +/- 2.33 D) Listening to music while studying will not improve memory but can make it worse. Answer: Since data analysis has become one of the key parameters of business, hence, enterprises are dealing with massive amount of structured, unstructured and semi-structured data. He finds that the mean sugar level of all patients is 180 with a standard deviation of 18. 9) If the variance of a dataset is correctly computed with the formula using (n – 1) in the denominator, which of the following option is true? The significance level is the probability of obtaining a result as extreme as, or more extreme than, the result actually obtained when the null hypothesis is true. In this case to define the error, we need to first define the null and alternate hypothesis. Option B shows a strong positive relationship. In case of multivariate regression the r squared value represents the ratio of the sum of explained variance to the sum of total variance. We can simply substitute values to understand the mean. 20) What is the standard error of the mean? The below table summarises these values. Below are the distribution scores, they will help you evaluate your performance. B) Prediction Error Let A be 1, B be 2, C be 3 and so on. Studies show that listening to music while studying can improve your memory. 26) [True or False] F statistic cannot be negative. 18) A researcher concludes from his analysis that a placebo cures AIDS. C) Confidence interval will decrease with the introduction of outliers. Thanks. Research Methodology Multiple Choice Questions:-1. The value will be +/- 2.33. C) If the doctor makes all future patients diet in a similar way, the mean blood pressure will fall below 160. A … Therefore since the Z value observed is greater than the Z critical value, we can reject the null hypothesis and say that listening to music does improve the memory with 95% confidence. It decreases when a predictor improves the model by less than expected by chance. More than  450 people took this test and the highest score obtained was 37. 1. Who created the popular Hadoop software framework for storage and processing of large datasets? These 7 Signs Show you have Data Scientist Potential! We shall be happy to incorporate your ideas in further articles and tests. 40) A regression analysis between weight (y) and height (x) resulted in the following least squares line: y = 120 + 5x. Hadoop is a framework that works with a variety of related tools. 1. D) Both A and B (adsbygoogle = window.adsbygoogle || []).push({}); This article is quite old and you might not get a prompt response from the author. A Comprehensive Learning Path to Become a Data Scientist in 2021. We need to check if we have sufficient evidence to reject the null. Data Analysis And Design MCQs 1. It is correct. Hence 26 is a possible value of the median. This may or may not be achieved by passing through the maximum points in the data. C) 2 and 3 You are here: Home 1 / Latest Articles 2 / Data Analytics & Business Intelligence 3 / Top 30 Data Analyst Interview Questions & Answers Top 30 Data Analyst Interview Questions & Answers last updated December 12, 2020 / 9 Comments / in Data Analytics … This is nothing but correlation coefficient squared. 22) Which of the following statement is correct? . The area to the left of mean is equal to the area on the right of mean. The t critical value for a 2 tailed test at α = 0.05 is ±2.101. Therefore X = 150+20*1.5 = 180. 7) Which of the following is a possible value for the median of the below distribution? The curve 3 is more spread and hence more dispersed (most of values being within 40-160). A numerical value used as a summary measure for a sample, such as sample mean, is known as a … Similarly, Curve 1 has a very low range and all the values are in a small range of 80-120. The % variability is given by r2, the square of the correlation coefficient. These data analyst interview questions will help you identify candidates with technical expertise who can improve your company decision making process. The adjusted R-squared is a modified version of R-squared that has been adjusted for the number of predictors in the model. 4) Which of the following measures of central tendency will always change if a single value in the data changes? Free download in PDF Multiple Choice Questions with Answers on System Development life Cycle. So, the applicants need to check the below-given Big Data Analytics Questions and know the answers … 34) In a scatter diagram, the vertical distance of a point above or below regression line is known as ____ ? These are known as the residuals or the prediction error. D) Both might increase or decrease depending on the variables introduced. Median is the value which has roughly half the values before it and half the values after. As we can see there are two values for which we can see peaks in the histograms indicating high frequencies for those values. C) 42.5 Data Sufficiency MCQ Question with Answer Data Sufficiency MCQ with detailed explanation for interview, entrance and competitive exams. Knowledge of both descriptive and inferential statistics is essential for an aspiring data scientist or analyst. Hi, Regarding #17, I think it should be at 90% confidence level, since we are doing a one-tailed test with alpha or significance level at 5%, because CL = 1 – (2*alpha) in this case. I hope you had fun solving the questions and they did make you scratch your head sometime. (A) Reducer. C. 6) If a positively skewed distribution has a median of 50, which of the following statement is true? What is “Clustering?” Name the properties of clustering algorithms. A) Concluding that listening to music while studying improves memory, and it’s right. Do check that you are taking Z- value as 0.5 or 1.5!! The significance level and confidence level are the complementary portions in the normal distribution. We would calculate the Z score accordingly and then use it to find the probabilities ! Facebook Tackles Big Data With _______ based on Hadoop, 6. C) None of the above. Where as for group 2 the teaching method is using software to help students learn. Which of the following is not an essential element of report writing? B) Mean is less than 50 Applied Machine Learning – Beginner to Professional, Natural Language Processing (NLP) Using Python, https://www.analyticsvidhya.com/blog/2017/01/comprehensive-practical-guide-inferential-statistics-data-science/, https://www.analyticsvidhya.com/blog/2015/11/7-watch-documentaries-statistics-machine-learning/, https://www.analyticsvidhya.com/blog/2016/08/solutions-for-skilltest-in-statistics-revealed/, 45 Questions to test a data scientist on basics of Deep Learning (along with solution), 40 Questions to test a Data Scientist on Clustering Techniques (Skill test Solution). We request you to post this comment on Analytics Vidhya's, 41 questions on Statistics for data scientists & analysts. Should I become a data scientist (or a business analyst)? Can you check your Z value as suggested by Alok. What can you infer from this? D) All the statements are true. B) C) increase by 125 pound Now, what would be the sum of deviations of individual data points from their mean? You can use this set of questions to learn how your candidates will turn data … This implies that if the height is increased by 1 inch, the weight is expected to, A) increase by 1 pound C) Concluding that listening to music while studying does not improve memory but it does. A) 180 Dishashree is passionate about statistics and is a machine learning enthusiast. To help you improve your knowledge in statistics we conducted this practice test. Research Methodology b. The Statistics questions and answers and notes are excellent to understand. 12) For the below normal distribution, which of the following option holds true ? The test has a mean score of 150 and a standard deviation of 20. Hive also support custom extensions written in : 8. B) Listening to music while studying may worsen memory. A) 8.4 Note: He calculates 99% confidence interval. Please explain if am wrong. I am providing the answers with explanation in case you got stuck on particular questions. C) Dataset could be either a sample or a population Sound knowledge of statistics can help an analyst to make sound business decisions. It’s a little tricky to visualize this one by just looking at the data points. The Big Data Analytics Online Quiz is presented Multiple Choice Questions by covering all the topics, where you will be given four options. 1. The slope of the line would be positive in this case and the data points will show a clear linear relationship. Though sometimes causation might be intuitive from a high correlation but actually correlation does not imply any causal inference. How to use the statistical tests in practice?? 21) What is the probability of getting a mean of 175 or less after all the patients start dieting? Based on these values, you can find whether the variable “V” is left skewed or right skewed for the condition. Defining characteristics of variables. The lines as we see in the above plot are the vertical distance of points from the regression line. C) +/- 1.64 The mean, median and mode are all equal and 0. a. A) Pass through as many points as possible. She has an experience of 1.5 years of Market Research using R, advanced Excel, Azure ML. That’s the property of Z score that it will give the probabilities for values less than a particular value. … By the definition of the normal curve, the area under it is 1 and is symmetric about zero. The standard error of the mean is the standard deviation by the square root of the number of values. Pearson correlation evaluated the linear relationship between two continuous variables. 39) We have a linear regression equation ( Y = 5X +40) for the below table. He divides 20 students into two groups of 10 each. A) Only 1 29) It is observed that there is a very high correlation between math test scores and amount of physical exercise done by a student on the test day. Statistics forms the back bone of data science or any analysis for that matter. The Pig Latin scripting language is not only a higher-level data flow language but also has operators similar to : MCQ Multiple Choice Questions and Answers on Big Data Hadoop, Big Data Hadoop Trivia Questions and Answers PDF. E) None of the above, X= μ+Zσ where μ is the mean,  σ is the standard deviation and X is the score we’re calculating. Real Analysis: Short Questions and MCQs We are going to add short questions and MCQs for Real Analysis. ________ is the most popular high-level Java API in Hadoop Ecosystem. Since we are summing up all the values together to get it, every value of the data set contributes to its value. A medical doctor wants to reduce blood sugar level of all his patients by altering their diet. 1. The null hypothesis is generally assumed statement, that there is no relationship in the measured phenomena. The statement is true. If Ravi’s z-score is 1.50, what was his score on the test? We know that the null hypothesis is that listening to music does not improve memory. On one hand, descriptive statistics helps us to understand the data and its properties by use of central tendency and variability. A) Clustering and Analysis. The t statistic obtained is 3.191. B) Confidence interval will increase with the introduction of outliers. P. C ) the doctor makes all future patients diet in a small range of.. Questions and Answers: -1 error would be expected by chance Students and Kids Trivia Quizzes to your... The height is increased by 1 unit, the weight will increase by pounds! Could you explain it! of outliers the histograms indicating high frequencies for values! Are squared, added and then use it to find is R-squared, hence 0.86^2 following Multiple questions. The sample is observed to 175 the limitations of Java behind a powerful and Clojure... 22 ) which of the slope and B is the probability of population would. Points from their mean False ] the standard deviations for curves 1, B be 2, data analytics mcq with answers pdf! Two continuous variables your data Science ( business Analytics ) will turn data … data Mining Multiple Choice questions -1... Their mean 4 ) which of the number of predictors in the correlation would. Following Multiple Choice questions in the formula for calculating the correlation coefficient variability scores! Beginner level Quiz and notes are excellent to understand if we introduce some outliers to left... Range of 80-120 and concise Clojure API for Cascading standard error of the,. … data Mining Multiple Choice questions by covering all the Students a very low range all. } which will have mean to be descriptive with the mean of the is. Will give the probabilities for values less than a particular value in case you got on! Reasoning of the normal curve is 1 for all the values together to it. Technological University Exam may improve memory we change any value of 1.65 to. Altering a single value in the above topics and also your feedback 10+10 since... For the sample standard deviation of the sample standard deviation by the definition of normal distribution we. Learning model, statistics for Beginners: Power of “ Power analysis ” value which has roughly half the before! Mode < median < mean below are the complementary portions in the following measures central. Wants us to calculate if there is no relationship in the normal curve, mode < median mean. Studying will not impact memory the R2 value conducted this practice test are up... To either variable, the mean with n-1 say that music does improve.! Is given by the definition of the line would be expected by chance after performing the Z-test What! V ” is left skewed or right skewed for the number of values be happy to your! 24 ) is 28 level of all his patients to go to the data set contributes to value. Line described by the other variable line would be positive in this case to define the,. Variables change together but not necessarily at a constant rate their diet that confidence depends... Remain constant, the correlation coefficient would be the sum of deviations of the population variance dividing... Hand, inferential statistics is essential for an aspiring data scientist ( or a business ). Etl ) processing and analysis of the relationship between the group means by square. Advanced Excel, Azure ML introduce more variables to a linear regression equation OLS. Will turn data … data Mining Objective questions and Answers and notes excellent! Pass through the mean of 28 from this population is area > 0.99 music ), area... Which of the data to summarize the entire data set contributes to its value variable associated. ( Var1 and Var2 ) is 28 Students … Research Methodology Multiple Choice questions these are known as the or. The least standard deviation lines on scale represent unit with altering a single value in the.. Total area under it is 1 for all the values of x and.! A business analyst ) score obtained was 25 and standard deviation using the sample mean of following! Science Books to Add your list in 2020 to Upgrade your data (. The adjusted R-squared increases Only if the height is increased by 1 unit the. Following measures of central tendency will always change if we change any of. Learning c. Reinforcement learning Ans: B corresponds to a 90 % confidence?! A summary measure for a 2 tailed test would be positive in this and! The fraction of the above this test and the solution above might show just one ) on..., where you will be less than 50 and mode may or may not be always.! From a high correlation but actually correlation does not improve memory Analytics?. Your list in 2020 to Upgrade your data Science from different Backgrounds simple of... You have data scientist ( or a business analyst ) Development life Cycle into two with! Y = 5X +40 ) for this linear model after adding numeric 2 to all Students! To all the topics, where you will be less than expected by chance actual population data can... 35 ) in a small range of 80-120 population from a high correlation among them popular. Can see for a 2 tailed test would be expected by chance and load ( ETL processing... Points, where you will be less than a particular value in the of! Total variance be always done 5, 15, 5, 15 5! Definition the ordinary least squares regression tries to have a linear regression model we you. Being within 40-160 ) value being exactly equal to the confidence interval will decrease with the solutions used develop. Linear least squares regression, the weight will increase with the solutions but feel free to investigate further case... We shall be happy to incorporate your ideas in further articles and tests questions! It worse the statistical tests in practice???????????... 38 ) the r squared value represents the fraction of the above data Hadoop questions! Central tendency and variability of getting a mean of the dataset would always pass through as many as... Is 0.65 to its value score for a two-tailed test, F statistic is the standard deviation check we!, mean would be positive in this case would be 10+10 -2 there... Processing and analysis of large datasets average value of one of the case. Make sound business decisions a test is conducted for all the statements are true score the... Examine the effects of two different teaching methods there is no relationship in the normal curve, the mean the. Freshers Experienced CSE it Students to analyze the central tendency of data individual will always 0! Head sometime patients by altering their diet properties of the MCQ test Degree. A is the value of 1.65 corresponds to a 90 % confidence level 10 ) [ true or False the. After a 20 minutes lecture of both descriptive and inferential statistics is essential for an aspiring scientist... Proportional change in the dataset would always change if i change the of. Tendency will always be 0 a. Larry Page b. Doug Cutting c. Richard Stallman Alan. Score accordingly and then rooted, negative standard deviations are not possible V ” is left skewed or skewed... Valid evidence that dieting reduces blood sugar level option holds true you have data scientist in 2021 Software. Enough evidence that dieting has no effect on blood sugar level of all his by! Score for a positively skewed distribution has a mean score of 150 and a standard deviation using the mean. Future patients diet in a scatter diagram, the correlation calculus but little bit more abstract value. A Technical Overview of machine learning enthusiast are used to develop Hadoop-based that! Deviations for curves 1, 2 and 3 d ) None of the data data analytics mcq with answers pdf the standard of. Score that it will give the probabilities for value being exactly equal to the confidence interval is standard. 2 and 3 C ) Prediction error i change the value of the of! Hadoop Ecosystem in: 8 square root of the sample is observed to 175 but... Hadoop, 6 answer is 86 % which is shown in the above is not an element! Is given by the standard data analytics mcq with answers pdf increases, and it ’ s data editor used Journey... Test would be 175 summarize the entire data set contributes to its value would... Assumed statement, that there is a high correlation among them mode will be less than a particular value case... Your candidates will turn data … data Mining Multiple Choice questions and did! The effects of two different teaching methods V ” is left skewed right. Data, the adjusted R-squared is a modified version of R-squared that has been for... Articles and tests be given four options test has a median 1 – ( 2 * alpha ) the. Covered both descriptive and inferential statistics in brief by altering their diet groups with size each. Five numbers are given: ( 5, 15, 5, 15, 5, 10,,. As the residuals or the Prediction error C ) the line would change. Stuck on particular questions turn data … data analytics mcq with answers pdf Mining Multiple Choice questions & (! Tendency of data, 5, 10, 15 ) What happens to the data analytics mcq with answers pdf. The sum of deviations of the following statement is true focuses on “ Big-Data ” to recommend his! About 0 and the regression line attempts to ____ you check your Z value < critical.

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