Measures of Dispersion Questions and Answers | Online Quiz for Practice

46. The measure of dispersion which uses only two observations is called:

1. Range
2. Quartile deviation
3. Mean deviation
4. Standard deviation

47. In quality control of manufactured items, the most common measure of dispersion is:

1. Range
2. Average deviation
3. Standard deviation
4. Quartile deviation

48. The range of the scores 29, 3, 143, 27, 99 is:

1. 140
2. 143
3. 146
4. 70

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

1. -48
2. 40
3. -40
4. 48

50. The range of the values -5, -8, -10, 0, 6, 10 is:

1. 10
2. -10
3. 20

51. If Y = aX ± b, where a and b are any two numbers and a ≠ 0, then the range of Y values will be:

1. Range(X)
2. a range(X) + b
3. a range(X) – b
4. |a| range(X)

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

1. 10
2. 15
3. 25
4. 35

53. Half of the difference between upper and lower quartiles is called:

1. Interquartile range
2. Quartile deviation
3. Mean deviation
4. Standard deviation

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

1. 3
2. (1/3)
3. (2/3)
4. 1

55. Which measure of dispersion can be computed in case of open-end classes?

1. Standard deviation
2. Range
3. Quartile deviation
4. Coefficient of variation

56. If Y = aX ± b, where a and b are any two constants and a ≠ 0, then the quartile deviation of Y values is equal to:

1. a Q.D(X) + b
2. |a| Q.D(X)
3. Q.D(X) – b
4. |b| Q.D(X)

57. The sum of absolute deviations is minimum if these deviations are taken from the:

1. Mean
2. Mode
3. Median
4. Upper quartile

58. The mean deviation is minimum when deviations are taken from:

1. Mean
2. Mode
3. Median
4. Zero

59. If Y = aX ± b, where a and b are any two numbers but a ≠ 0, then M.D(Y) is equal to:

1. M.D(X)
2. M.D(X) ± b
3. |a| M.D(X)
4. M.D(Y) + M.D(X)

60. The mean deviation of the scores 12, 15, 18 is:

1. 6
2. 3
3. 2