Question # 1

If z = x - y then ̅̅̅̅̅̅z̅ is:

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x̅+y̅

x̅ - y̅

0

x̅y̅

E(X - μ)² =

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^Zero

S,D

Variance

Mean deviation

Given var (x) = 3 and var (y) = 5.1 f x and y are independent variables then var (x- y)=

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-2

8

24

2

The probability of drawing any one spade card is:

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1/52

1/13

4/13

1/4

In chain base method,the base period is:

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Fixed

Changed

Constant

None of these

In normal distribution in the parameter which controls the relative flatness of the curve is:

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m

S

√2p

e

Graph of times series is called

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Pie diagram

Scatter diagram

Histogram

Historigram

Variance of the values 8,8,8,8,8,is:

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8

0

64

None of these

An estimator is........ if its expected value is equal to the population parameter to be estmated

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Bad

Based

Unbiased

None of these

In hypergeometric distribution trials are:

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Independent

Dependent

Constant

None of these

A graph of a cumulative frequency distribution is called:

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Frequency curve

Frequency polygon

Ogive

Histogram

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NAT I General Science Statistics MCQs With Answers

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