Question # 1

If var (x) =5, var(y) =10, then var (2x + y) is:

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10

15

30

25

The formula used to estimate a parameter is called:

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Estimate

Estimation

Bais

Estimator

If a and b are two constants then var (a+ bx) =

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± b var (x)

Var (a) ± var (x)

b² var (x)

(a±b) var (x)

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

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C

0

1

x

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

In random sampling the probability of selecting and item from the population is

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Un-known

Known

Undecided

None

Variance of b,b,b,b is:

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b

4b

Zero

None of these

If E (X) =4, then find arithmetic mean will be:

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4

8

0

1

How many basic types of index numbers are?

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2

3

5

4

The variance of binomial distribution is:

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np

nq

npq

None of these

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NAT I General Science Statistics MCQs With Answers

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