Question # 1

Which set has teh maximum varaition?

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46,48,50

30,40,50

40,50,60

48,48, 49

First central moment is always.

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0

1

-1

2

the standard deviation is independent of.

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Change of origin

Change of scale of measurement

Change origin and scale of meaturement

None of these

The distribution is positively skewed if.

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Mean < Mode

Mean > Mode

Mean > Median

Both b and c

If the third moment about mean is zero ( m3 = 0) , then the distribution is.

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Mesokurtic

Positively skewed

Symmetrical

Negatively skewed

β is a letter

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German

Greek

Latin

Dutch

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

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Mean

Mode

Median

All of these

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

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-6

6

-10

-4

The mean deviation is least if deviations are taken from

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A.M

Mode

G.M

Median

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

If the value of a variable are -2, -3, -5, -10 then range is.

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-12

8

-8

0

The difference between largest and smallest observation is called

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Interval

Class interval

Range

Difference

The variance of constant is always

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Constant

One

Positive

Zero

The value of quartile deviation is always

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Positive

Zero

Negative

None of these

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

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Range can be calculated in open-end classes.

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Never

Always

Often

Seldom

If Mean = 25 and S² =25 the C.V is

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100%

25%

20%

None of these

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Statistics Ics Part 1 Chapter 4 Online Test MCQs With Answers

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