Business Statistics and Research Methods MCQs

Question 1

In a general class interval, margin of error is equal to

Accepted Answer

$$m = Z_{1 - \frac{\alpha }{2}}^2.\frac{\sigma }{{\sqrt n }}$$

Answer

$$m = Z_{1 - \frac{\alpha }{2}}^2.\frac{{{\sigma ^2}}}{{\sqrt n }}$$

Answer

$$m = Z_{1 - \frac{\alpha }{2}}^2.\frac{\sigma }{n}$$

Answer

$$m = {z_{1 - \frac{\alpha }{2}}}.\frac{\sigma }{{\sqrt n }}$$

Question 2

The value of the median of an even discrete series will be

Accepted Answer

$${\left[ {\frac{{n + 1}}{2}} ight]^{{	ext{th}}}}{	ext{value}}$$

Answer

$${\left[ {\frac{n}{2}} ight]^{{	ext{th}}}}{	ext{value}}$$

Answer

$${5^{{	ext{th}}}}{	ext{ value}}$$

Answer

$${\left[ {\frac{{n + 1}}{4}} ight]^{{	ext{th}}}}{	ext{value}}$$

Question 3

Match the following. List-I (Terms) List-II (Definitions) a. Simple regression 1. Process of predicting one variable from another b. Multiple regression 2. Single variable is used to predict another variable on the assumption of linear relationship between the given variables c. Simple linear regression analysis 3. Involves two or more independent variables and one dependent variable

Accepted Answer

a-1, b-3, c-2

Answer

a-1, b-2, c-3

Answer

a-3, b-1, c-2

Answer

a-3, b-2, c-1

Question 4

By which of the following methods, the sampling error, in comparison to biased approach, can be reduced?

Accepted Answer

increasing the sample size

Answer

increasing response rate

Answer

interpolation

Answer

changing the title

Question 5

The significance of the difference between two means of the populations, when σ2 values are known and equal, is tested by

Accepted Answer

x2 - test

Answer

z - test

Answer

t - test

Answer

f - test

Question 6

The . . . . . . . . is less sensitive to extreme scores than the . . . . . . . .

Accepted Answer

median, mean

Answer

mean, median

Answer

mode, median

Answer

None of the above

Question 7

If a frequency distribution is positively skewed, the mean of the distribution is:

Accepted Answer

greater than the mode

Answer

less than the mode

Answer

equal to the mode

Answer

none of these

Question 8

The joint probability is:

Accepted Answer

The likelihood of two events happening together

Answer

The likelihood of an event happening given that another event has already happened

Answer

Based on two mutually exclusive events

Answer

Also called prior probability

Question 9

If a perpendicular on X-axis from the point of intersection of both 'less than' and 'more than' frequency curves is drawn, it gives the value of

Accepted Answer

Median

Answer

Arithmetic mean

Answer

Third quartile

Answer

Mode