Question # 1

Events with equal probabilities are called.

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Mutually exclusive events

Exhauative events

Eqauily likely events

Simple events

F(-∞) is always equal to

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Zero

One

Two

Negative one

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

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E(y)

[E(y)]²

E(y)²

E² (y)

What is the probability that a value chosen at random from a particular population is larger than the median of the popultion.

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0.25

0.5

1.0

0.67

The probability of red card out of 52 cards is.

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1/4

1/2

4/52

zero

When three coins are tossed simulatneously, P(3 heads) is.

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3/8

1/2

1/8

1/4

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

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E(XY)

xE(y)

E(XY)

E(X) . E(Y)

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

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

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y₁ = y₂

Y₁ > y₂

None of these

Random variable is also called ___________.

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Chance stochasitc

Coverges

Random

None of these

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

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Equal

Discrete

Continuous

Always greater then oen

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

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An experiment

An event

A probability

A trail

Waht is the probability that a ball drawn at random from the bag is.

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0.1

0.4

1.0

Cannot be determined from given information

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

The probability of an impossible event is.

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Positive

Zero

Negative

1

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

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Equal

Converges

Discrete

None of these

Which one is not an example of random experiments.

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A coin is tossed and the outcome is either a head or a tail

A six sided aid is rolled

All medical insurance clams received by a company in a given year.

Some one of person will be admitted to a hospital emergency room during any hour.

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Statistics Ics Part 1 Chapter 7 Online Test MCQs With Answers

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