Statistics

Variance remains unchanged by change of________________?

A. Origin

B. Scale

C. Both

D. None of these

Lowest value of variance can be________________?

A. 1

B. -1

C. 3

D. 0

The sum of squared deviations of a set of n values from their mean is__________________?

A. Zero

B. Maximum

C. Least

D. None

Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 is_________________?

A. 8

B. 2

C. 12

D. 0

The measure of dispersion is changed by a change of_____________?

A. Origin

B. Scale

C. Algebraic Signs

D. None

A measure of dispersion is always ________________?

A. Zero

B. Positive

C. Negative

D. Infinity

The algebraic sum of deviations from mean is_____________?

A. Maximum

B. Zero

C. Minimum

D. Undefined

You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of ?

A. Descriptive statistics

B. Inferential Statistics

C. Parameter

D. Population

Which one of the following measurement does not divide a set of observations into equal parts ?

A. Quartiles

B. Standard Deviations

C. Percentiles

D. Deciles

Which of the following is not based on all the observations ?

A. Geometric Mean

B. Harmonic Mean

C. Weighted Mean

D. Mode