Question # 1

If 'c' is a non-random variable then E(c) is:

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Zero

C

Two

None of these

Variance of b,b,b,b is:

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b

4b

Zero

None of these

Shortage of certain consumer goods before annual budget

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Secular trend

Seasonal variation

Cyclical variation

Irregular variation

Which is correct for the binomial distribution:

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Mean > Variance

Mean < Variance

Mean = Variance

Mean = standard Deviation

Given N = 5 and n = 3 in simple random sampling with replacement how many possible samples are there?

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10

125

60

15

When the two variables are uncorrelated the value of r is

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-1

0

+1

None of these

The properties of hypergeometric experiment are:

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Three

Four

Five

One

A graph of a cumulative frequency distribution is called:

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Frequency curve

Frequency polygon

Ogive

Histogram

Two attributes are independent if

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(AB) = (A)(B) / N

(AB) ¹ (A)(B) / N

(AB) > (A)(B) / N

(AB) < (A)(B) / N

The most commonly used mathematical method for measuring trend is

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Moving average method

Semi-average method

Method of least squares

Free- hand curve method

The probability of an event cannot be

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=0

>0

=1

<0

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