Statistics MCQs

Page No. 52

Probability distribution of a random variable is also know as Probability_________________?


aProbability Function

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b Distribution Function

✓


cProbability Distribution

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dProbability Density Function

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The probability function is always______________?


aNegative

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bNon Negative

✓


cPositive

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dNone

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View Answer Non Negative

A discrete probability distribution may be represented by____________?


aA Table

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bA Graph

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cA mathematical Equation

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dAll of these

✓


View Answer All of these

For discrete random ‘X’, the expectation of X i.e., E(x) is equal to:________________?


a∑P(x)

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b∑x.P(x)

✓


c ∑x2P(x)

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dOne

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View Answer ∑x.P(x)

If a & b are constants, then Var (a + bX) equal to_________________?


aVar(bX) + a

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bb2 Var(X)

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c b Var(x)

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dNone of these

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View Answer b2 Var(X)

The number of defective bulbs in a lot is example of ____________?


aContinuous variable

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bDiscrete variable

✓


cFunction

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dNone of these

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View Answer Discrete variable

A random variable is ____________ ?


a Not a function

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bA continuous variable

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cA function

✓


dNone of these

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View Answer A function

A function probability that a random variable of x has a value less than is called _____________?


a Random function

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bDistribution function

✓


cContinuous function

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dprobability function

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View Answer Distribution function

_________ are the numbers obtained by some random process?


aTwo- digit number take

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b Random table

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cPack

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d Non of these

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View Answer Random table

Two digit random numbers are ________________?


a2

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b10

✓


c99

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d100

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View Answer 10

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