Question # 1

When X denotes the number of success in binomial experiment, it is called.

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Random variable

Binomial random variable

Continuous random variable

Both (B) and (C) but not (A)

The binomial distribution deal with:

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Discrete variable

Continuous variable

None of these

The probabilyt density function p (x) cannot exced.

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zero

One

Mean

Infinity

The probability of success changes from trial to trial, is the property of:

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Binomial experiment

Hypergeometric experiment

Both A and B

None of these

If we do not replace the draw cards back into the pack before the next draw, the used probability distribution will be:

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Binomial

Hypergeometric

Both binomial & hypergeometric

None of these

Random number can be generated manully by

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Dawing cards from numbered cards

Roitaing or spinning numbered wheels

Use of random numbers table

All of these

The probability of success ------------ from one trial to another when trials are dependent

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Remains constant

Is changed

One

Zero

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)

Which of the following distribution(s) has 3 parameters.

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Binomial distribution

Hypergeometric distribution

Both of the above

None of these

Its value cannot be exactly examined.

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Ranodm variable

Fixed varaible

Mathematical variable

Variable

The binomial distribution is symmetrical if

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p = 1/2

P > 1/2

p < 1/3

P ≠ q

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

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c

0

1

x

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

If (E(X) = E than find arithmetic means will be.

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1

4

0

8

In hypergeometric distribution, the successive trials are.

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Dependent

Independent

Both (A) & (B)

None of these

If x is a continuous random vriable, then the function f (x) is.

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A probability function

A probability denaity function

A density function

Both b and c

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 discrete probability distributio may be represented by.

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A table

A graph

A mathematical equation

All of these

The repeated trials of binomial experiments are

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Dependent

Independent

Fixed

Variable

Binomial distribution is used when n is

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Large

Small

Negative

Zero

Probility density function is the probebilyt function of.............. random variable.

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Discrete

Qualitative

Continuous

None

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

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1/3

1/6

An expected value of a random variable is equal to its.

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Variance

B.D.

Mean

Co - Variance

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