Question # 1

test2

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3

4

2

The range of the scores 19,3,140,25,95,is

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140

137

143

3

For a moderately skewed dsitribution, whihc of the following emprical formula holds.

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M.D. = 4/5(S.D)

Q.D. = 2/3 (S.D)

Q.D . = 5/6 (M.D.)

All of these

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

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Range

Standard deviation

Variance

A.M

The value of quartile deviation is always

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Positive

Zero

Negative

None of these

In a skewed distribution the three averages man, median & mode are.

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identical

different

0

equal 1

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

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Mean

Mode

Median

All of these

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 positive square root of the mean of the squares of deviations of values from their mean is

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Variance

Covariance

Standard deviation

Standard error

Co-efficent of standard deviation can be measured by the following formula

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Teh range of the value -2, -4, -6 and -8 is.

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-6

6

-10

-4

Why is it necessary to square the difference from the mean when computing the standard deviation.

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So that the extreme values will not affect the calculation

Some of the differnece will be positive and some will e negative

It can change drastically from one data set to the next

It is determined by only two points in the data set

The mean deviation of dispersion can be negative.

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Often

Sometimes

Always

Never

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

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0

25

5

125

Mean deviation = S.D

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2/3

4/5

5/6

6/5

The variance of constant is always

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Constant

One

Positive

Zero

Pearson's co-efficient of skewness is positive when distribution is

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Negatively skewed

Positively skewed

Symmetrical

Leptokurtic

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

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Statistics Ics Part 1 Chapter 4 Online Test MCQs With Answers

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