Question # 1

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

F (+∞) is always equal to:

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0

Two

One

None of these

Variance of σ² is equal E to (Y²) - _______?

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E (y)

[E(y)]²

E(y²)

None of these

If the random variable x denotes the number of heads of when three distinct coins are tossed k the X assumes values.

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0,1,2,3

1,3,3,1

1,2,3

1,1,1,1

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

The probability of getting an odd number when a balanced die is rolled is.

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1/2

1/3

1/4

1/6

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

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E(x)

-7X

-7E(X)

Zero

E(y-μ) is equal to

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E(y)

μ

zero

y-μ

Var (3x + 2)

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3 Var(X) + 2

3 Var X

9 var (x) + 2

9 var (x)

A lettter is chosen at random from the word STATITICS , The probability of getting a vowel is.

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1/5

3/10

1/2

2/5

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

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Sample point

Sure event

sample event

simple event

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)

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

The probability of drawan any one spade card is.

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1/32

1/18

1/4

4/13

If x and y are independent random variables, then E(xy)

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E(xy)

xE(y)

E(x)

E(x)E(y)

Which of the following cannot be probability of an event.

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0

1

0.32

1.00

Var (3x+2)

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3Var(x) + 2

9Var(x) +2

Var (x) + 0

3Var (X)

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Statistics Ics Part 1 Chapter 7 Online Test MCQs With Answers

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