Question # 1

The types of dispersion are.

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2

3

4

5

If X and Y are independent, than Var ( X -Y) is equal to.

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Var (X) + Var (Y)

Var (X) - Var (Y)

Var (X+ Y)

Zero

test2

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3

4

2

The distribution is measokurtic if the moment coefficient of of kurtosis b2 is.

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Equal to 0

Equal to 3

Less than 3

Greater than zero

The mean deviation can never be

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Positive

Negative

Zero

None of these

In symmetrical distribution if Q1 = 4, Q3 = 12 then median is.

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4

6

8

zero

Which is a poor measure of dispersion in open-end distribution.

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Range

Standard deviation

Variance

A.M

In measure of relative dispersion unit of measurement is.

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Changed

Vanishes

Does not vanishes

None of these

The sum of absolute deviations is a minimum if these deviations are taken from the

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Mean

Mode

Median

All of these

The sum of absolute deviations is a minimum if these deviations are taken from the

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Mean

Mode

Median

All of these

First central moment is always.

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0

1

-1

2

For symmetrical distribution mega 3 is.

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zero

1

2

3

First moment about mean is always equal to

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One

Negative

Zero

Positive

Co-efficent of quartile deviation can be calculated by the following formula

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The compare the variation of two or more than two sereies, we use.

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Mean absolute deviation

Variance

Coefficient of viariation

Corrected atandard deviation

The lack of symmetry is called________.

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consistent

skewness

Equidistant

Kurtosis

The S.D. of 8,8,8,8,8, is.

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8

(8)²

zero

5

The variance of 4,4,4,4,4 is.

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-4

(4)²

8

0

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