Question # 1

F(y₁) ≤ F(y₂) if

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y₁= y₂

Y₁>y₂

y₁≤y₂

y≥1/2

If y =-7x then E(y) = ...............

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E(x)

-7X

-7E(X)

Zero

The probability of getting one red ball from a bag constaining 4 red, 3 white and 3 black balls is.

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3/10

1/5

2/5

1/2

Var (B/aX) =?

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1/aVar(X)

b²/a² Var(X)

b²/a Var(X)

None of these

E(Y2) -[E(y)]2 is the formula, and to compute.

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Variance of the random variable

Mean of the random variable

Both A and B

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

If a is a constant then E(a) is equal to

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a

Square of a

Zero

2a

When a pair of dice is rolled, the sum of upperemost dots vary from.

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0 to 10

1 to 11

2 to 19

2 to 12

If x is a random variable with E(x) = 5 then E (3x - 2) =

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0

1

13

15

F(-∞) is always equal to.

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Zero

One

Two

Negative one

If x is a random variable with E(x) = 5 then E(3x - 2) =

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0

1

13

All of them

The probability of getting two red balls with replacement from a bag containing 4 red, 3 white and 3 black balls is.

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4/25

1/25

9/100

2/25

Events with equal probabilities are called.

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Mutually exclusive events

Exhauative events

Eqauily likely events

Simple events

the collection of all possible outcome of a random experimnet is called.

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Sample point

Sure event

sample event

simple event

Random variable is also called ___________.

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Chance stochasitc

Coverges

Random

None of these

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8

0

1/8

3

For discrete random variable 'X' the expectation of X I-e E(x) is equal to:

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Σp(x)

Σxp(x)

Σx²p(x)

One

a measure of the chance that an uncertain event will occur.

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An experiment

An event

A probability

A trail

A random variable is also called.

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Chance variable

Stochastic variable

Discrete variable

Both A and B

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Statistics Ics Part 1 Chapter 7 Online Test MCQs With Answers

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