ELEMENTS OF STATISTICS, SET 17

ELEMENTS OF STATISTICS

Q.1

What is the angle between two regression lines when correlation coefficient between two variables is zero ?

Ans. 

90°.

Q.2

Non parametric test are based on

Ans. .

Flexible assumptions

Q.3

What you understand if the rank correlation coefficient is +1 ?

Ans. 

It reveals that the ranks given by two persons are the same and there is a perfect association between the ranks.

Q.4

A normal deviate test (Z test) does not take into account

Ans. 

Degrees of freedom.

Q.5

The number of independent constraints in the set of observation is called

Ans. 

Degrees of freedom.

Q.6

Which test of non parametric methods is similar to x² test of goodness of fit ?

Ans. 

Kolmogorov–Smirnov test.

Q.7

Ordinary sign test is based on the sign of the Teaps bas deviations from

Ans. 

Median.

Q.8

The correction factor in the analysis of variance is equal to

Ans. 

(Grand observation)² / Number of observations.

Q.9

What is the range of x² static ?

Ans. 

0 ≤ x² ≤ ∞.

Q.10

What is the range of t static ?

Ans. 

– ∞ ≤ t ≤ ∞.

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