Question # 1

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

Which measure of disperesion is considered as the best genereal purpose measure of dispersion.

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Range

Semi interquartile range

Standard deviation

Mean deviation

First moment about mean is always equal to

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One

Negative

Zero

Positive

The mean deviation of dispersion can be negative.

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Often

Sometimes

Always

Never

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

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140

137

143

3

Moment ratios b1 and are.

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Expressed in original unit of the data

Dimensionless quantities

Independent of origin and scale of messurement

Both b and c

Fist moment about origin in is always equal

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Mean

Variance

Zero

1(One)

For symmetrical distributions the values of co-efficent of skewness is

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Negative Number

Positive Number

Imaginary Number

Pure Number

Mean deviation = S.D

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2/3

4/5

5/6

6/5

If Q3 = 20 and Q1 = 10 the coefficient of quartile deviation is.

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3

1/3

2/3

1

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 of the absolute deviations of observations from mean, median or mode is called

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Quartile deviation

Absolute deviation

Mean

Mean deviation

Which of the following is a relatie measure of dispersion.

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Standard deviation

Variance

Coefficient of variation

All of these

The distribution is positively skewed if.

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Mean < Mode

Mean > Mode

Mean > Median

Both b and c

The mean deviation can never be

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Positive

Negative

Zero

None of these

β is a letter

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German

Greek

Latin

Dutch

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

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None of these

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

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Statistics Ics Part 1 Chapter 4 Online Test MCQs With Answers

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