Question # 1

If E (X) = 1.6 and E (Y) = 0.4, then E (X - Y) =--------------

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1.2

-0.2

2.0

None of these

In the regression equation x =a + by then called

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Independent variable

Dependent variable

Quantitative variable

Continuous variable

The probability of an event can never be

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Zero

1

0.5

Negative

The variance of 5,5,5,5,5,is

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0

25

5

125

In Mesokurtic distribustion

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m₄ < 3s⁴

m₄ = 3s⁴

m₄ ¹ 3s⁴

m₄ > 3s⁴

Basic year weighted index numbers are:

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Laspeyre's

Paasche's

Fisher's

None of these

Is a normal distribution μ = 10 and σ² = 25 the mode is

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5

10

25

100

By decreasing ×̅ the length of confidence interval for m

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Increases

Decreases

No effect

None of these

The index numbers calculated by considering the relative importance of variables are called:

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Un-weighted

Weighted

Simple

None

In chain base method,the base period is:

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Fixed

Changed

Constant

None of these

A hypothesis in which all parameters are specified is called

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Composite hypothesis

Null hypothesis

Simple hypothesis

All

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NAT I General Science Statistics MCQs With Answers

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