Business Statistics and Research Methods MCQs

Question 1

If x is a random variable and 'a' and 'b' are constants, then Var (ax + b) is

Accepted Answer

(a + b) Var (x)

Answer

(a2 + b2) Var (x)

Answer

ab Var (x)

Answer

a2 Var (x)

Question 2

The two tails of the normal distribution . . . . . . . . the horizontal axis.

Accepted Answer

never touches

Answer

touches

Answer

sometimes touches

Answer

None of these

Question 3

Which of the following is restricted non-probability based sampling method?

Accepted Answer

Quota sampling

Answer

Stratified sampling

Answer

Cluster sampling

Answer

Systematic sampling

Question 4

The criterion which enables us to classify various sampling units into different strata is termed as . . . . . . . .

Accepted Answer

stratifying factor

Answer

probability factor

Answer

Both A and B

Answer

Neither A nor B

Question 5

The most appropriate average to be used to compute the average rate of growth in population is:

Accepted Answer

Geometric mean

Answer

Arithmetic mean

Answer

Median

Answer

Harmonic mean

Question 6

The limits of the population correlation is

Accepted Answer

r ± P.E.

Answer

r ± 3 S.E.

Answer

r ± 3 P.E.

Answer

None of these

Question 7

The independent variable in a regression line is:

Accepted Answer

Non-random variable

Answer

Random variable

Answer

Qualitative variable

Answer

None of the above

Question 8

Percentage bar diagram is similar to sub-divided bar diagrams. The only difference is

Accepted Answer

in percentage bars diagram length of bar are equal while it is unequal in sub-divided bar diagram

Answer

in percentage bars diagram width is equal while unequal in sub-divided bar diagram

Answer

Both A and B

Answer

None of the above

Question 9

Which of the following not true for binomial distribution?

Accepted Answer

All trial are dependent

Answer

The experiment is performed repeatedly

Answer

Outcome of random experiment results in the dichotomous classification of events

Answer

None of the above