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Statistics MCQs with Explanations

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331StatisticsMedium

If X and Y are independent then SD (X − Y) is________?

AVar(X)+Var(Y)−−−−−−−−−−−−−−−√

BSD(X)−SD(Y)

Correct answer

B. SD(X)−SD(Y)

Explanation

The correct answer is SD(X)−SD(Y).

332StatisticsMedium

If any value in the data is zero, then which of the following average vanishes ________?

AMode

BA.M.

CG.M.

DNone of these

Correct answer

C. G.M.

Explanation

The correct answer is G.M..

333StatisticsMedium

Statistical Laws are valid in the ________?

AShort run

BLong run

CPlural sense

Dindefinite

Correct answer

B. Long run

Explanation

The correct answer is Long run.

334StatisticsMedium

Which of the following divides a group of data into four subgroups?

ADeciles

BQuartiles

CMedian

DPercentiles

EStandard Deviation

Correct answer

B. Quartiles

Explanation

The correct answer is Quartiles.

335StatisticsMedium

For +ve and -ve skewed, check the sign of ________?

Aβ1

Bμ2

Cμ3

Dβ2

Correct answer

C. μ3

Explanation

The correct answer is μ3.

336StatisticsMedium

If x = 3 then value of regression co-efficient of X or Y is ________?

A-4

B(3)

C(0)

Correct answer

C. (0)

Explanation

The correct answer is (0).

337StatisticsMedium

Successive trials in binomial distribution are:________?

AEqually Likely

BDependent

CNon

DIndependent

EMutually exclusive

Correct answer

D. Independent

Explanation

The correct answer is Independent.

338StatisticsMedium

The Mann-Whitney U test is preferred to a t-test when________?

ASample are dependent

BThe assumption of normality is not met

CData are paired

DSample sizes are small

Correct answer

B. The assumption of normality is not met

Explanation

The correct answer is The assumption of normality is not met.

339StatisticsMedium

In a table, foot note and source notes are ________?

ASame

BNon-identical

CIdentical

DDifferent

Correct answer

D. Different

Explanation

The correct answer is Different.

340StatisticsMedium

For Mesokurtic curve of the distribution, β2 is________?

ANone of these

BZero

Correct answer

C. 3

Explanation

The correct answer is 3.

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