Business Statistics and Research Methods MCQs

Question 1

Mean and variance of poisson distribution is equal to

Accepted Answer

(m), (Σr2P(r) - m2)

Answer

(m2), (Σr2p(r) - m2)

Answer

(m2), (P(r) - m2)

Answer

(m), (P(r) - m2)

Question 2

Karl Pearson's coefficient of correlation between two variables x and y is equal to

Accepted Answer

None of the above

Answer

covariance between two variables

Answer

product of their standard deviation

Answer

square root of the product of two regression coefficient

Question 3

Fisher's ideal index is based on

Accepted Answer

geometric mean of Laspeyre's & Paasche's index

Answer

arithmetic mean of Laspeyre's & Paasche's index

Answer

median of Laspeyre's & Paasche's index

Answer

None of the above

Question 4

. . . . . . . . is particularly useful when we have to compute the mean of means.

Accepted Answer

None of the above

Answer

Arithmetic mean

Answer

Geometric mean

Answer

Weighted arithmetic mean

Question 5

For a positively skewed disttibution, mean is always:

Accepted Answer

Greater than the mode

Answer

Less than the median

Answer

Less than the mode

Answer

Difficult to tell

Question 6

It is helpful to use a multi-stage cluster sample when:

Accepted Answer

all of the above

Answer

the population is widely dispersed geographically

Answer

you have limited time and money available for travelling

Answer

you want to use a probability sample in order to generalise the results

Question 7

Systematic sampling is used for which of the following? 1. Quota sampling 2. Non-probability sampling 3. Probability sampling

Accepted Answer

Only 3

Answer

Both 1 and 2

Answer

Both 2 and 3

Answer

Only 2

Question 8

The first measure of dispersion is called-

Accepted Answer

mean deviation

Answer

arithmetic mean

Answer

standard deviation

Answer

quartile deviation

Question 9

Let A and B be two events such that the occurrence of A implies occurrence of B, but not vice-versa, then the correct relation between P(A) and P(B) is:

Accepted Answer

P(B) ≥ P(A)

Answer

P(A) < P(B)

Answer

P(A) = P(B)

Answer

P(A) ≥ P(B)