Question # 1

If mean = 25 and variance is also 25, then coefficient of variation is

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100%

25%

20%

10%

A student soved 25 questions from first 50 questios of a book to be solved. The prob, that he will solve the remaining all questions.

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0.25

0.51

1

0

If two coins are tossed, the probability of getting one head and one tail is.

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1/4

2/4

3/4

2/3

The probability distribution of discrete random variable is called is

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Frequency distribution

Probability distribution

Probability mass function

Both (a) and (b)

the term 'event' is used for.

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Time

Subaet of the sample space

Total number of outcomes

Probability

The properties of discrete probability distribution are:

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Σp (x) = 1 and Σx. (x) = 1

ΣP (x)= 1 and Σx. P

ΣP(x) = 1 and 0 < P(x) ≤ 1

All of these above

The range of probability is between

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0 to 2

-1 to +1

0 to 8

0 to 1

A probability function is _________ function.

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Mathematical

Mathematical expectation

Converges

None of these

For a constant k, the variance of k is

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zero

k²

k

none of these

Coefficient of variation (C.V) is given below

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Mean /S.D x10

Mean/S.D x 100

S.D/Mean x 100

S.D/ Mean

Which of the following is suitable for discrete probability distribution.

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Frequency polygon

Probability

Ogive

Histogram

A random variable is also called.

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Chance variable

Stochastic variable

Discrete variable

Both A and B

The coins are tossed, the porbability of two tails is euql to.

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1/2

1/4

3/4

1

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8

0

1/8

3

Why are the outcomes of a coin tossing mutually exclusive.

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The outcome of any toss is not affected by teh outcome of those preceding it.

Both a head and a tail cannot turn up on any one toss

The probability of getting a head and the probability of getting a tail is the same.

All of these

Var (KY) = ......................

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KY

K² Var(Y)

K²Var (Y)

None of these

E(y-μ) is equal to

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E(y)

μ

zero

y-μ

For a constant K ,the variance of K.

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Zero

A^-2

K

None of these

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Statistics Ics Part 1 Chapter 7 Online Test MCQs With Answers

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