Measures of Dispersion Objective Question and Answer
Measures of Dispersion MCQ Multiple Choice Questions - Page 6 for Practice
Measures of Dispersion MCQ Questions for Practice
76. If Y = aX ± b, where a and b are any two constants and a ≠ 0, then Vat (Y) is equal to:
Correct Answer is: a2 Var(X) – b
77. If Y = aX + b, where a and b are any two numbers but a ≠ 0, then S.D(Y) is equal to:
Correct Answer is: |a| S.D(X)
78. The ratio of the standard deviation to the arithmetic mean expressed as a percentage is called:
Correct Answer is: Coefficient of variation
79. Which of the following statements is correct?
Correct Answer is: The variance is positive quantity and is expressed in square of the units of the observations
80. Which of the following statements is false?
Correct Answer is: Variance of the sum or difference of any two variables is equal to the sum of their respective variances
81. If Var(X) = 25, then is equal to:
Correct Answer is: 5
82. To compare the variation of two or more than two series, we use
Correct Answer is: Coefficient of variation
83. The standard deviation of -5, -5, -5, -5, 5 is:
Correct Answer is: Please check the page for the answer.
84. Standard deviation is always calculated from:
Correct Answer is: Mean
85. The mean of an examination is 69, the median is 68, the mode is 67, and the standard deviation is 3. The measures of variation for this examination is:
Correct Answer is: 3
86. The variance of 19, 21, 23, 25 and 27 is 8. The variance of 14, 16, 18, 20 and 22 is:
Correct Answer is: 8
87. In a set of observations the variance is 50. All the observations are increased by 100 %. The variance of the increased observations will become:
Correct Answer is: 200
88. Three factories A, B, C have 100, 200 and 300 workers respectively. The mean of the wages is the same in the three factories. Which of the following statements is true?
