Statistics MCQs

Page No. 57

Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be______________?


a50

✓


b70

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c50/20

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d50-20 = 30

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View Answer 50

The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?


a20

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b5

✓


c2.5

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d5.5

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View Answer 2.5

The standard deviation is always _________ than mean deviation?


aGreater

✓


bLess

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cEqual

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dNone

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View Answer Greater

The measure of Dispersion can never be________________?


aPositive

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bNegative

✓


c0

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d1

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View Answer Negative

If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?


a100%

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b25%

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c20%

✓


dNone of these

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View Answer 20%

The first moment about means is always_________________?


aZero

✓


b1

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cNegative

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dNone of these

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View Answer Zero

Lack of symmetry is called_______________?


aAbsolute Dispersion

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bRelative Dispersion

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cSkewness

✓


dNon of these

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View Answer Skewness

If right tail is longer than left tail then distribution is called _________________?


a Negatively Skewed

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bPositively Skewed

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cAll of above

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dNone of these

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View Answer Positively Skewed

______________is based on all observations of data?


aMedian

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bMode

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cMode

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dNone of these

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View Answer Mode

For Mesokurtic curve of the distribution, β2 is__________________?


aZero

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b3

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c3.1

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dNone of these

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View Answer 3

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