ELEMENTS OF STATISTICS, SET 4

ELEMENTS OF STATISTICS

Q.1

Under the assumption for analysis of variance, the parent population should be.

Ans. 

Normal.

Q.2

For any two values a & b the what relationship among Arithmetic mean (A) Geometric mean (G) and Harmonic mean (H) holds ?

Ans. 

G²= A.H.

Q.3

For testing the hypothesis about mean of one population we use 't' test when.

Ans. 

Sample size is small and S.D. is unknown.

Q.4

For testing the significance of correlation coefficient we use.

Ans. 

't' test.

Q.5

To test the agreement between observed od frequencies and expected frequencies we use.

Ans. 

Chi Square test.

Q.6

In the case of perfect negative correlation the coefficient of correlation will be.

Ans. 

–1.

Q.7

There is no skewness when the values of mean, median & mode are.

Ans. 

Equal.

Q.8

When Mean > Median > Mode, skewness will be.

Ans. 

Positive.

Q.9

Probability of any event is a number lying between.

Ans. 

0 to 1 (0≤ p ≤ 1).

Q.10

Probability is the science of.

Ans. 

Decision making.

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