Question # 1

The probabilyt that a continous random varaibe 'x ' takes on specific value of x is.

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Greater thaan zero

Less than zero

Equal to Zero

0 to 1

In binomial distribution, the random variable has a range:

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

0,1,2,......+∞

-∞ to +∞

∞ to +0

In hypergeometric distribution, the successive trials are.

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Dependent

Independent

Both (A) & (B)

None of these

if X and Y are independent random varaibesl the S.D. (X-Y) is equal to

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Var (X) - var (Y)

Var (X) + Var (Y)

E(X-Y)2

E(X + Y)2

The repeated trials of binomial experiments are

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Dependent

Independent

Fixed

Variable

The probabilyt density function p (x) cannot exced.

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zero

One

Mean

Infinity

A fair die is rolled three times. The probability of getting three "aces" is

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1/3

1/6

Random numbers can be generated mechanically by

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By use of digital computers

Probgrammable calculators

Ordinary calculators

Both a and b

If the random variable X denotes the number of heads when three distinet coins are tossed,then X assumes the value.

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0.1.2.3

1,3,3,1

1,2,3

None of these

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

Mean of hypergeometric distribution is

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np

Nnk

Random numbers are generated from the single digit numbers.

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{ 1,2,3,............. 10 }

{ 0, 1,2,.......................... 10}

{ 0,1,2.............}

{0,1,2,............. 9}

Binomial distribution is positively skewed

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P < 1/2

P > 1/2

P = 1/2

P < q < ¹/₂

Which of the following is true for binomial distribution

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Mean > variance

Mean < variance

Mean = variance

Mean + standard deviation

Variance of binomial distribution is

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np

√npq

npq

nq

If C is a non -random variabe than E (C) is.

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c

0

1

x

If in binomial distribution, μ = 6, p = 3/5, the number of trial are:

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18

30

10

None of these

The expected value of a discrete random variable is.

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Always an integer

Always one of the values that the random variable can assume

An interal of values

None of these

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Statistics Ics Part 1 Chapter 8 Online Test MCQs With Answers

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