Question # 1

The mean deviation of dispersion can be negative.

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Often

Sometimes

Always

Never

Mean deviation = S.D

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2/3

4/5

5/6

6/5

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

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-6

6

-10

-4

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

A disadvantage of range is that it is based on.

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Absolute deviation

Square deviation

Two extreme observation

Upper and quartile

Fist moment about origin in is always equal

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Mean

Variance

Zero

1(One)

The sum of absolute deviation form median is.

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zero

negative

least

maximum

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

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

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4

6

8

zero

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

β is a letter

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German

Greek

Latin

Dutch

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

Mean deviationis always.

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More than S.D.

Equal to S.D.

Less than S.D.

None of these

If Y=X + A , trhe range of Y =

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Range (X)

Range (X) + A

Zero

A

Which of the following statements is correct.

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Every symmetrical curve is measokurtic

Standard deviation is the mean squared deviations from the mean

The standard deviation of a constant is constant

Teh second moment about zero equals variance.

In a symmetrical distribution the coefficient of skewness is equal to.

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-1

+1

0

None of these

β₁ is a quantity

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Dimensional

Dimension less

Positive

Negative

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

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Range

Standard deviation

Variance

A.M

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Statistics Ics Part 1 Chapter 4 Online Test MCQs With Answers

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