Question # 1

E(x) = Σxf(x) if it ________ absolutely.

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Equal

Converges

Discrete

None of these

F(-∞) is always equal to

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Zero

One

Two

Negative one

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4/10

2/10

1/10

0

The sum of probabilities of events of a sample space is always.

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Equal

Discrete

Continuous

Always greater then oen

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

15

Var (3x + 2)

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3 Var(X) + 2

3 Var X

9 var (x) + 2

9 var (x)

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

Which of the following cannot be probability of an event.

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0

1

0.32

1.00

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 probability of continuous random variable at x = a is__________.

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One

Zero

Between

More then one

Hourly temperature recorded by weather brave is the example of:

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Discrete variable

Continuous variable

Qualitative

Both A and B

Events with equal probabilities are called.

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Mutually exclusive events

Exhauative events

Eqauily likely events

Simple events

Variance σ²is equal to E(y²) - --------------------

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E(y)

[E(y)]²

E(y)²

E² (y)

The result of no interest of an experiment is called.

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Contstant

even

Failure

Success

The numbered balls are paced in an urn, Numbers 1- 4 are red and numbers 5 -10 are blue. the probability that a ball drawn at random from the run is blue is.

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0.1

0.4

0.6

1.0

Which is the impossible event when a dice is rolled.

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5 or 6

6 or 7

2 or 3

1

Var (B/aX) =?

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1/aVar(X)

b²/a² Var(X)

b²/a Var(X)

None of these

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Statistics Ics Part 1 Chapter 7 Online Test MCQs With Answers

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