This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Commerce > Economics Statistics For Economics > Class 11 Economics (Statistics For Economics) Chapter 6 Measures Of Dispersion – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Economics (Statistics For Economics) Chapter 6 Measures Of Dispersion Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which measure of dispersion is most affected by outliers? A) Mean deviation. B) Median. C) Range. D) Interquartile range. Show Answer Correct Answer: C) Range. 2. The mean and the Standard deviation for following valuesi 3ii 11iii 4iv 7v 5is ..... A) 5 and 2.83. B) 5 and 2.4. C) 5.5 and 0.4. D) 6 and 2 83. Show Answer Correct Answer: D) 6 and 2 83. 3. Suppose you have 3 data values of 12, 14, and 16. If a value of 30 is added to the data set, what effect does this have on the mean and standard deviation? A) The mean and standard deviation will not change. B) The mean will increase, but the standard deviation will not change. C) Both the mean and standard deviation will increase. D) The mean will stay the same, but the standard deviation will increase. Show Answer Correct Answer: C) Both the mean and standard deviation will increase. 4. What is the quartile deviation? A) A measure of skewness. B) A measure of correlation. C) A measure of variability. D) A measure of central tendency. Show Answer Correct Answer: C) A measure of variability. 5. Standard de3viataion is usually used to compare two sets of data. If the value of the standard deviation is very small the data is more A) Dispersed. B) Consistent. C) Random data. D) None of the above. Show Answer Correct Answer: B) Consistent. 6. Find the interquartile range for this set of data 1 3 4 6 7 9 11 A) 3. B) 6. C) 4. D) 9. Show Answer Correct Answer: B) 6. 7. If the mean is consistent across all sets, which set of data exhibits values that are closer to the mean value, considering their respective standard deviations?Set 1:Standard deviation = 15.9Set 2:Standard deviation = 14.64Set 3:Standard deviation = 17.88Which set displays values that are relatively closer to the mean, given their standard deviations? A) Set 1. B) Set 3. C) Not enough information is provided. D) Set 2. Show Answer Correct Answer: D) Set 2. 8. Which of the following are the merits of SD? A) It is based on all values. B) Algebraic Treatment. C) Certain Measure. D) All are correct. Show Answer Correct Answer: D) All are correct. 9. Which among the following is NOT true about the measures of variation? A) It does not tell us that the scores are compressed or spread out. B) It is also known as measures of spread. C) The higher the variability the higher the spread of scores. D) The lower the variability the lesser the spread of scores. Show Answer Correct Answer: A) It does not tell us that the scores are compressed or spread out. 10. If the value of Coefficient of variation is more, the consitency of the data is A) More. B) Less. C) Same. D) None of this. Show Answer Correct Answer: B) Less. 11. Standard deviation is always ..... A) Negative. B) Positive. C) Zero. D) None of the above. Show Answer Correct Answer: B) Positive. 12. The class interval X-55 has a midpoint of 52. State the value of X. A) 50. B) 47. C) 49. D) 48. Show Answer Correct Answer: C) 49. 13. What does a high variance value indicate about the data set? A) Consistent data points. B) Large variability within the dataset. C) Small range of values. D) Low variability within the dataset. Show Answer Correct Answer: B) Large variability within the dataset. 14. Which measure is used to find the middle 50% of a data set? A) Mode. B) Mean. C) Median. D) Interquartile range. Show Answer Correct Answer: D) Interquartile range. 15. If sample A has a standard deviation of 10 and sample B has a standard deviation of 2, which sample has the larger spread of values? A) Sample A. B) Sample B. C) Neither, standard deviation does not measure spread. D) None of the above. Show Answer Correct Answer: A) Sample A. 16. Percentage of data for each level A) Relative frequency. B) Cumulative frequency. C) Frequency distribution. D) Midpoint. E) Range. Show Answer Correct Answer: A) Relative frequency. 17. What is the standard deviation for the data given:{12, 13, 29, 18, 61, 35, 21} A) 17.14. B) 15.87. C) 41.98. D) 293.67. Show Answer Correct Answer: A) 17.14. 18. The variance of a set of data is 18. Find the new variance if each value in the set of the data is substracted by 5 and the divided by 3. A) 6. B) 8. C) 11. D) 2. Show Answer Correct Answer: D) 2. 19. Why is median also known as the 50th percentile? A) The median is the average of all values in a dataset. B) The median is also known as the 50th percentile because it divides the dataset into two equal parts. C) The median is the most common value in a dataset. D) The median is the highest value in a dataset. Show Answer Correct Answer: B) The median is also known as the 50th percentile because it divides the dataset into two equal parts. 20. The standard deviation describes the spread about which of the following? A) Median. B) Mode. C) Range. D) Mean. Show Answer Correct Answer: D) Mean. 21. What is the primary use of standard deviation? A) To calculate the quartiles. B) To find the average of a data set. C) To measure the spread of data points. D) To identify the mode of a data set. Show Answer Correct Answer: C) To measure the spread of data points. 22. The Mean Deviation is the least from the A) Mean. B) Median. C) Mode. D) None of the Above. Show Answer Correct Answer: B) Median. 23. What does variance represent? A) How the population varies compared to the sample. B) How spread out each data value is from the mean. C) The range, but with a bunch of other stuff going on. D) How many different variations are in the data set. Show Answer Correct Answer: B) How spread out each data value is from the mean. 24. The Variance of a data is 2.5. Find the new variance if each data is multiplied by 3. A) 22.5. B) 7.5. C) 13.5. D) None of the above. Show Answer Correct Answer: A) 22.5. 25. Which measure of central tendency is needed to solve the variance of a distribution? A) Median. B) Mean. C) Mode. D) Range. Show Answer Correct Answer: B) Mean. ← PreviousRelated QuizzesCommerce QuizzesClass 11 QuizzesClass 11 Economics (Statistics For Economics) Chapter 6 Measures Of Dispersion Quiz 1Class 11 Economics (Statistics For Economics) Chapter 6 Measures Of Dispersion Quiz 2Class 11 Economics (Statistics For Economics) Chapter 1 Introduction QuizClass 11 Economics (Statistics For Economics) Chapter 2 Collection Of Data QuizClass 11 Economics (Statistics For Economics) Chapter 3 Organisation Of Data QuizClass 11 Economics (Statistics For Economics) Chapter 4 Presentation Of Data QuizClass 11 Economics (Statistics For Economics) Chapter 5 Measures Of Central Tendency QuizClass 11 Economics (Statistics For Economics) Chapter 7 Correlation Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books