`Q 11. Standard deviation is always computed from`

(A) Mean
(B) Median
(C) Mode
(D) geometric mean

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`Q 12. The coefficient of variation cannot be meaningfully used to compare the variability of two or more sets of data, when`

(A) The standard deviation is zero for one or more sets of data
(B) The standard deviation is 1 for one or more sets of data
(C) The mean is zero for one or more sets of data
(D) The mean is 1 for one or more sets of data

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`Q 13. For a symmetrical distribution Q1=25, Q3=45, the median is`

(A) 20
(B) 25
(C) 35
(D) None of these

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`Q 14. Following are the Relative measures of dispersion except`

(A) Co-efficient of Mean deviation
(B) Standard deviation
(C) Co-efficient of Range
(D) Co-efficient of Quartile deviation

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`Q 15. The degree of peaked ness or flatness of a unimodal distribution is called:`

(A) Skewness
(B) Kurtosis
(C) Dispersion
(D) Normal distribution

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`Q 16. If the values of mean, median and mode coincide in a unimodal distribution, then the distribution will be:`

(A) Positively Skewed
(B) Symmetrical
(C) Negatively Skewed
(D) None of these

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`Q 17. In order to compare two series we can use`

(A) Coefficient of Variation
(B) Standard deviation
(C) Coefficient of Skewness
(D) Coefficient of kurtosis

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`Q 18. The standard deviation is independent of:`

(A) Change of scale
(B) Change of origin
(C) Change of origin and scale
(D) None of these

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`Q 19. Which of the following is a unit free measure of dispersion:`

(A) Range
(B) Standard deviation
(C) Interquartile range
(D) Coefficient of range

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`Q 20. The mean deviation is minimum when deviations are taken from:`

(A) Mean
(B) Median
(C) Mode
(D) None of these

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