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Statistics MCQs with Explanations

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261StatisticsMedium

A random variable may be ________?

Acontinuous

Bdiscrete

Cdiscrete or continuous

Dfixed

Correct answer

C. discrete or continuous

Explanation

The correct answer is discrete or continuous.

262StatisticsMedium

Which one of the following measurement does not divide a set of observations into equal parts?

AStandard Deviations

BQuartiles

CPercentiles

DMedian

EDeciles

Correct answer

A. Standard Deviations

Explanation

The correct answer is Standard Deviations.

263StatisticsMedium

In a Poisson probability distribution ________?

AThe probability of success is always greater than 5

BThe mean and variance of the distribution are same (equal)

Cit always contains a contingency table

DThe number of trials is always less than 5

Correct answer

B. The mean and variance of the distribution are same (equal)

Explanation

The correct answer is The mean and variance of the distribution are same (equal).

264StatisticsMedium

Cluster sampling is useful when sampling units are________?

AClose another

BMixed

CFar a part

DNone of these

Correct answer

C. Far a part

Explanation

The correct answer is Far a part.

265StatisticsMedium

Discrete random variable is real valued function defined on a ________ sample space?

ANon of these

BDiscrete

CVariable

DScale

Correct answer

B. Discrete

Explanation

The correct answer is Discrete.

266StatisticsMedium

The variance of 5 numbers is 10. If each number is divided by 2, then variance of new number is________?

A2.5

C20

Correct answer

A. 2.5

Explanation

The correct answer is 2.5.

267StatisticsMedium

Binomial distribution is used when ________ is large?

AnP

Dnq

Correct answer

C. n

Explanation

The correct answer is n.

268StatisticsMedium

When the word random variable use in statistics it must have?

AVariable

BNone of these

CValues

DProbability distribution

Correct answer

D. Probability distribution

Explanation

The correct answer is Probability distribution.

269StatisticsMedium

Shape of possion distribution depends upon?

AOn random variable X

BMean

CIts parameter

DVariance

Correct answer

C. Its parameter

Explanation

The correct answer is Its parameter.

270StatisticsMedium

if Var(θˆ)→0 as n → 0, then θˆ is said to be________?

AEfficient

BSufficient

CConsistent

DUnbiased

Correct answer

C. Consistent

Explanation

The correct answer is Consistent.

In a Poisson probability distribution ________?

AThe probability of success is always greater than 5

BThe mean and variance of the distribution are same (equal)

Cit always contains a contingency table

DThe number of trials is always less than 5

Correct answer

B. The mean and variance of the distribution are same (equal)

Explanation

The correct answer is The mean and variance of the distribution are same (equal).