Question # 1

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 relative frequency distribution presents frequencies in terms of

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Fractions

Whole numbers

Percentages

Both a and c but not b

Which of the following price indices are prepared by Federal Bureau of Statistics.

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Wholesale price index

Consumer price index

Sensitive price indicator

All of these

In hypergeometric distribution, the successive trials are.

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Dependent

Independent

Both (A) & (B)

None of these

The binomial distribution is symmetrical when:

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P > q

p = 1/2

Probability of success & probability of failure are equal

Both (B) and (C)

Mean deviation = S.D

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2/3

4/5

5/6

6/5

The probability of drawan any one spade card is.

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1/32

1/18

1/4

4/13

Important bases of classification are.

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Two

Three

Four

More than four

Geometric mean can be calculated by formula

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If two coins are tossed, the probability of getting one head and one tail is.

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1/4

2/4

3/4

2/3

A copntinuous probability distribution may be represented by.

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A table

a graph

A mathmethical equation

Botha b and c

In fixed base method, the base period should be.

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Far away

Normal

Un reliable

Abnormal

Why are the outcomes of a coin tossing mutually exclusive.

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The outcome of any toss is not affected by teh outcome of those preceding it.

Both a head and a tail cannot turn up on any one toss

The probability of getting a head and the probability of getting a tail is the same.

All of these

Which of the following methods uses quantities consumed in the current period when computing a weighted index.

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Laspeyres' method

Paache's method

Fisher's method

Marshall -Edge worth's method

If E a and impossible event, then P(E) is.

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0

0.5

1

Impossible

The weights used in a price index are.

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Percentage of total price

Average of prices

Quantities

None of these

A binomial random variable can assume the values

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1,2......n

0,1,2......00

0,1,2......n

2,4,6,8,10

In a symmetrical distribution, the coefficient of skewness will always be.

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Negative

zero

1

-1

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