Question # 1

In a discriete probability distribution the sum of all the probabilities is alwyas

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0

1

-1

8

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

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Variance

B.D.

Mean

Co - Variance

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

The binomial distribution is symmetrical if

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p = 1/2

P > 1/2

p < 1/3

P ≠ q

Variance of binomial distribution is

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np

√npq

npq

nq

Random numbers can be generated mechanically by

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By use of digital computers

Probgrammable calculators

Ordinary calculators

Both a and b

The repeated trials of binomial experiments are

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Dependent

Independent

Fixed

Variable

Mean, Median and mode of binomial distribution can be equal if

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P < q < 1/2

P > q < 1/2

P ≠ q

The binomial distribution deal with:

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Discrete variable

Continuous variable

None of these

Random numbers can be generated

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Manually

Mechanically

Botha a and b

None of these

If x is discrete random variable, then the function f (x) is.

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A probability function

A density function

A probability density function

A distribution function

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

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c

0

1

x

In binomial experiment successive trials are:

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Dependent

Independent

May be independent or dependent

None of these

Each trial of binomial experiment results in an outcome which can be classified in two categories

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Head or tail

Ace or six

Success and failure

None of these

If X and Y are random varaibes, than E ( X - Y) is equal to.

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E(X) + E (Y)

E(X) - E(Y)

X - E (Y)

E(X) - Y

Mean of hypergeometric distribution is

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np

Nnk

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)

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Statistics Ics Part 1 Chapter 8 Online Test MCQs With Answers

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