Question # 1

The most popular measure of dispersion in industry and meteorology is.

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Range

Quartile deviation

Mean deviation

Standard deviation

Relative depression is of types.

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1

4

3

2

For Laptokurtic distribution.

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b2 > 3

b2 < 3

b2 = 3

b1 > 3

For a symmetrical distribution.

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B1 = 0

B1 = 3

B2 = 3

B3 = 3

Quartile Co-efficient of skewness is also called as

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Median co-efficent of skewness

Pearson's 1st co-efficient of skewness

Pearson's 2nd co-efficient of skewness

None of these

If b₂ = 3, then the distribution is:

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leptokurtic

Platykurtic

Normal

None of these

For symmetrical distribution mega 3 is.

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zero

1

2

3

Karl Pearson's 1^st co-efficient of skewness is given by formula

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None of these

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

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8

(8)²

zero

5

The sum of the squares of deviations is the least when measured from.

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A.M

Median

Mode

Both A and B

Which of the following measures of dispersion is independent of the units employed.

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Standard deviation

Quartile deviation

_{Coefficient of variation}

Variance

In measure of relative dispersion unit of measurement is.

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Changed

Vanishes

Does not vanishes

None of these

If Mean = 25 and S² =25 the C.V is

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100%

25%

20%

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 variance of 5,5,5,5,5 is.

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0

25

5

125

In the grouped data , the range is the difference between.

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Two extreme class frequency

Two extreme class limits

Tow extreme class boundaries

None of these

The types of dispersion are.

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2

3

4

5

Mean deviation = S.D

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2/3

4/5

5/6

6/5

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