Question # 1

The number of ways in which a person enters by oe door and leaves by a different door in a room with three doors is.

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6

9

5

None of these

E(X ± Y) =..............

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E(X) + E(Y)

E(X) - E (Y)

E(x) ± E (Y)

None of these

Karl Pearson's 1^st co-efficient of skewness is given by formula

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None of these

An experiment which produced different outcomes even if it is repeated a large number of times, under similar conditions is called

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Event

Compound event

Random experiment

None of these

test2

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3

4

2

In which distribution the successive trials are without replacement.

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Hypergometric distribution

Bionomial dristribution

Continuous distribution

None of these

The distribution is measokurtic if the moment coefficient of of kurtosis b2 is.

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Equal to 0

Equal to 3

Less than 3

Greater than zero

When we draw the sample with replacement (the first sample is replaced before the next draw), the probability distribution to be used is:

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Binomial

Hypergeometric

Both Binomial & hypergeometric

None of these

Primary data are same:

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Group

Ungroup

Random

None of these

If X and Y are independent random variables , the E (XY) is equal to.

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E(XY)

E(X) E(Y)

XE(Y)

YE(X)

In a hypergeometric distribution N = 6, n = 2, K = 3 Then mean.

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1

2

3

4

^AP₃is equal to.

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3!

4!

5!

6!

The index number given by formula Σp_nq_n/Σp_nq_n x100 is:

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Laspeyres index

The paasche's index

The value index

None of these

Measurement usually provide.

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Discrete data

Continuous data

Primary data

Qualitative data

The parameters of the binomial distributions are

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x and n

x and p

p and q

n and p

Which of the following measures of dispersion is independent of the units employed.

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Standard deviation

Quartile deviation

_{Coefficient of variation}

Variance

Variance of binomial distribution is

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np

√npq

npq

nq

Importance of commodity is its

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Quantity

Quality

Weight

Price

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