Question # 1

Second moment about mean is:

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0

1

Variance

Standard deviation

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

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0

25

5

125

A constant can take values:

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Fixed

Not fixed

Zero

None of these

If mena = 40, Mode =42, then distribution is:

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+ skew

- skew

Symmetrical

All of these

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

A variable which takes measurable values is called a

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Constant

Discrete variable

Continuous variable

Qualitative variable

Graph of times series is called

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Pie diagram

Scatter diagram

Histogram

Historigram

The midpoint of the group 5,5-7,5 is

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6

6,5

7

13

In hypergeometric distribution trials are:

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Independent

Dependent

Constant

None of these

Probability of an event always lies between

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-1 and +1

-1 and 0

0 and 1

0 and ∞

Probability distribution of a statistic is called

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Sampling error

Sampling distribution

Standard error

Parameter

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NAT I General Science Statistics MCQs With Answers

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