Business Statistics and Research Methods MCQs

Question 1

Which of the following is not a property of the arithmetic mean?

Accepted Answer

It is always equal to the population mean

Answer

Its variance is no larger than the variance of the population distribution

Answer

It is unbiased

Answer

Its variance becomes smaller when the sample size gets bigger

Question 2

According to Kruskal-Wallis H-test, variable should be measured with

Accepted Answer

continuous level

Answer

discontinuous level

Answer

Both A and B

Answer

Neither A nor B

Question 3

Regression coefficient of x on y will be:

Accepted Answer

$$r\frac{{\sigma x}}{{\sigma y}}$$

Answer

$$\frac{{\sigma y}}{{\sigma x}}$$

Answer

$$r{\left( {\frac{{\sigma x}}{{\sigma y}}} \right)^2}$$

Answer

$$r{\left( {\frac{{\sigma y}}{{\sigma x}}} \right)^2}$$

Question 4

The formula to find the mid point of a class is

Accepted Answer

$$\frac{{{L_1} + {L_2}}}{2}$$

Answer

$${L_1} + {L_2}$$

Answer

$${L_1} - {L_2}$$

Answer

$$\frac{{{L_1} - {L_2}}}{2}$$

Question 5

How will the arithmetic mean be affected by adding a constant 'b' to every item?

Accepted Answer

$$\overline X + b$$

Answer

$$\overline X - b$$

Answer

$$\frac{{\overline X }}{b}$$

Answer

None of these

Question 6

When the population mean is either lower or higher than some hypothesised value . . . . . . . . Is considered to be appropriate.

Accepted Answer

one tailed test

Answer

two tailed test

Answer

Both A and B

Answer

None of these

Question 7

If the Karl Pearson coefficient of correlation between x and y is 0.3, then the coefficient of correlation between -x and 2y is

Accepted Answer

0.3

Answer

-0.6

Answer

-0.3

Answer

0.5

Question 8

'Statistics is the science of Counting.' Whose statement is this?

Accepted Answer

Bowley

Answer

King

Answer

Seligman

Answer

None of these

Question 9

Which of these reports provide information without any evaluation?

Accepted Answer

Informational

Answer

Interpretative

Answer

Routine

Answer

Progress