ELEMENTS OF STATISTICS, SET 15

ELEMENTS OF STATISTICS

Q.1

Who gave the definition of mathematical probability ?

Ans. 

Von-Mises.

Q.2

By deterministic phenomena, we mean that results can be predicted with

Ans. 

Certainty.

Q.3

For two independent events A and B, the conditional probability P (A/B)

Ans. 

A.

Q.4

When do two random variables are said to be independent ?

Ans. 

When cov(X, Y)=0.

 i.e. correction coefficient r=0.

Q.5

If X follows a binomial distribution with parameter n and p, then what is the distribution of (n–X) ?

Ans. 

Bionomial distribution with parameter n and q.

Q.6

The normal distribution was discovered by____. 

Ans. 

De-Moivre.

Q.7

If X is normally distributed with zero mean and unit variance, then mean and variance of X² equal to

Ans. 

1 and 2.

Q.8

What to does β in the regression equation γ=α+βx+γ indicate ?

Ans. 

Slope of the line.

Q.9

Predictor variables are also known as

Ans. 

Independent variable.

Q.10

Response variables are also known as

Ans. 

Dependent variable.

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