Business Statistics and Research Methods MCQs

Question 1

The arithmetic mean of a frequency distribution is 5. If each frequency is multiplied by 5, the arithmetic mean will be

Accepted Answer

5

Answer

25

Answer

10

Answer

50

Question 2

Standard deviation is always . . . . . . . . range.

Accepted Answer

Less than

Answer

Greater than

Answer

Equal to

Answer

Sometimes less, sometimes more

Question 3

Time Reversibility Test is satisfied when

Accepted Answer

P01 × P10 = 1

Answer

P01 × P10 = 0

Answer

P01 × P10 > 1

Answer

P01 × P10 < 1

Question 4

The scatter diagram of two variables X and Y gives an idea

Accepted Answer

All of these

Answer

Correlations

Answer

Function relation

Answer

Regression

Question 5

Investigator in statistics is known as:

Accepted Answer

A person who collects the information

Answer

A person who checks the details of addresses of several respondents

Answer

A person who classifies the collected information

Answer

A person who fills the questionnaire

Question 6

Let x = $$\frac{{9 - U}}{3}$$ and y = V - 4 and the correlation coefficient between U and V is -0.93. Then the correlation coefficient between x and y will be

Accepted Answer

-0.93

Answer

0.093

Answer

-0.093

Answer

Cannot be derived

Question 7

Match the following from the given observations 15, 20, 25. List-I List-II a. Arithmetic mean 1. 30 b. Sum of deviations from their arithmetic mean 2. 20 c. Range 3. 10

Accepted Answer

a-2, b-1, c-3

Answer

a-1, b-2, c-3

Answer

a-1, b-3, c-2

Answer

a-3, b-2, c-1

Question 8

The measure based on each value of series is

Accepted Answer

Standard deviation

Answer

Range

Answer

Quartile deviation

Answer

Inter-Quartile Range

Question 9

Suppose the average weight of 9 persons is 50 kg. Average weight of the first 5 person is 45 kg, whereas average weight of the last 5 persons is 55 kg. then the weight of the 5th member will be

Accepted Answer

50.0 kg

Answer

45.0 kg

Answer

47.5 kg

Answer

52.5 kg