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Chapter: Unit 2

1. |
## The measurements of spread or scatter of the individual values around the central point is called: |

A. | Measures of dispersion |

B. | Measures of central tendency |

C. | Measures of skewness |

D. | Measures of kurtosis |

Answer» A. Measures of dispersion |

2. |
## The scatter in a series of values about the average is called: |

A. | Central tendency |

B. | Dispersion |

C. | Skewness |

D. | Symmetry |

Answer» B. Dispersion |

3. |
## The measures used to calculate the variation present among the observations in the unit of the variable is called: |

A. | Relative measures of dispersion |

B. | Coefficient of skewness |

C. | Absolute measures of dispersion |

D. | Coefficient of variation |

Answer» C. Absolute measures of dispersion |

4. |
## The measures used to calculate the variation present among the observations relative to their average is called: |

A. | Coefficient of kurtosis |

B. | Absolute measures of dispersion |

C. | Quartile deviation |

D. | Relative measures of dispersion |

Answer» D. Relative measures of dispersion |

5. |
## The degree to which numerical data tend to spread about an average value called: |

A. | Constant |

B. | Flatness |

C. | Variation |

D. | Skewness |

Answer» C. Variation |

6. |
## The measures of dispersion can never be: |

A. | Positive |

B. | Zero |

C. | Negative |

D. | Equal to 2 |

Answer» C. Negative |

7. |
## If all the scores on examination cluster around the mean, the dispersion is said to be: |

A. | Small |

B. | Large |

C. | Normal |

D. | Symmetrical |

Answer» A. Small |

8. |
## If there are many extreme scores on all examination, the dispersion is: |

A. | Large |

B. | Small |

C. | Normal |

D. | Symmetric |

Answer» A. Large |

9. |
## Given below the four sets of observations. Which set has the minimum variation? |

A. | 46, 48, 50, 52, 54 |

B. | 30, 40, 50, 60, 70 |

C. | 40, 50, 60, 70, 80 |

D. | 48, 49, 50, 51, 52 |

Answer» D. 48, 49, 50, 51, 52 |

10. |
## Which of the following is an absolute measure of dispersion? |

A. | Coefficient of variation |

B. | Coefficient of dispersion |

C. | Standard deviation |

D. | Coefficient of skewness |

Answer» C. Standard deviation |

11. |
## The measure of dispersion which uses only two observations is called: |

A. | Mean |

B. | Median |

C. | Range |

D. | Coefficient of variation |

Answer» C. Range |

12. |
## The measure of dispersion which uses only two observations is called: |

A. | Range |

B. | Quartile deviation |

C. | Mean deviation |

D. | Standard deviation |

Answer» A. Range |

13. |
## In quality control of manufactured items, the most common measure of dispersion is: |

A. | Range |

B. | Average deviation |

C. | Standard deviation |

D. | Quartile deviation |

Answer» A. Range |

14. |
## The range of the scores 29, 3, 143, 27, 99 is: |

A. | 140 |

B. | 143 |

C. | 146 |

D. | 70 |

Answer» A. 140 |

15. |
## If the observations of a variable X are, -4, -20, -30, -44 and -36, then the value of the range will be: |

A. | -48 |

B. | 40 |

C. | -40 |

D. | 48 |

Answer» B. 40 |

16. |
## The range of the values -5, -8, -10, 0, 6, 10 is: |

A. | 0 |

B. | 10 |

C. | -10 |

D. | 20 |

Answer» D. 20 |

17. |
## If the maximum value in a series is 25 and its range is 15, the maximum value of the series is: |

A. | 10 |

B. | 15 |

C. | 25 |

D. | 35 |

Answer» A. 10 |

18. |
## Half of the difference between upper and lower quartiles is called: |

A. | Interquartile range |

B. | Quartile deviation |

C. | Mean deviation |

D. | Standard deviation |

Answer» B. Quartile deviation |

19. |
## If Q3=20 and Q1=10, the coefficient of quartile deviation is: |

A. | 3 |

B. | 1/3 |

C. | 2/3 |

D. | 1 |

Answer» B. 1/3 |

20. |
## If the quartile range is 24 then the quartile deviation is: |

A. | 48 |

B. | 12 |

C. | 24 |

D. | 72 |

Answer» B. 12 |

21. |
## The sum of all the squared deviations is divided by the total number of observations to calculate |

A. | population deviation |

B. | population variance |

C. | sample deviation |

D. | sample variance |

Answer» B. population variance |

22. |
## For the recorded observation, the ratios measured by absolute variation are considered as |

A. | non-relative measures |

B. | relative measures |

C. | high uniform measures |

D. | low uniform measures |

Answer» B. relative measures |

23. |
## If the arithmetic mean is multiplied to coefficient of variation then the resulting value is classified as |

A. | coefficient of deviation |

B. | coefficient of mean |

C. | standard deviation |

D. | variance |

Answer» C. standard deviation |

24. |
## If mean absolute deviation of set of observations is 8.5 then value of quartile deviation is |

A. | 7.08 |

B. | 9.08 |

C. | 10.2 |

D. | 11.2 |

Answer» A. 7.08 |

25. |
## For a positively skewed distribution, mean is always: |

A. | Less than the median |

B. | Less than the mode |

C. | Greater than the mode |

D. | Difficult to tell |

Answer» C. Greater than the mode |

26. |
## If the sum of deviations from median is not zero, then a distribution will be: |

A. | Symmetrical |

B. | Skewed |

C. | Normal |

D. | All of the above |

Answer» B. Skewed |

27. |
## The degree of peaked ness or flatness of a unimodel distribution is called: |

A. | Skewness |

B. | Symmetry |

C. | Dispersion |

D. | Kurtosis |

Answer» D. Kurtosis |

28. |
## In a mesokurtic or normal distribution, µ4 = 243. The standard deviation is: |

A. | 81 |

B. | 27 |

C. | 9 |

D. | 3 |

Answer» D. 3 |

29. |
## In a symmetrical distribution, Q3 – Q1 = 20, median = 15. Q3 is equal to: |

A. | 5 |

B. | 15 |

C. | 20 |

D. | 25 |

Answer» D. 25 |

30. |
## The first three moments of a distribution about the mean are 1, 4 and 0. The distribution is: |

A. | Symmetrical |

B. | Skewed to the left |

C. | Skewed to the right |

D. | Normal |

Answer» A. Symmetrical |

31. |
## For a symmetrical distribution: |

A. | β1 > 0 |

B. | β1 < 0 |

C. | β1 = 0 |

D. | β1 = 3 |

Answer» C. β1 = 0 |

32. |
## The second and fourth moments about mean are 4 and 48 respectively, then the distribution is: |

A. | Leptokurtic |

B. | Platykurtic |

C. | Mesokurtic or normal |

D. | Positively skewed |

Answer» C. Mesokurtic or normal |

33. |
## Bowley's coefficient of skewness lies between: |

A. | 0 and 1 |

B. | 1 and +1 |

C. | -1 and 0 |

D. | -2 and +2 |

Answer» B. 1 and +1 |

34. |
## The value of β2 can be: |

A. | Less than 3 |

B. | Greater than 3 |

C. | Equal to 3 |

D. | All of the above |

Answer» D. All of the above |

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