Business Statistics and Research Methods MCQs

Question 1

A fitted least squares regression line:

Accepted Answer

may be used to predict a value of y if the corresponding x value is given

Answer

is evidence for a cause-effect relationship between x and y

Answer

can only be computed if a strong linear relationship exists between x and y

Answer

none of these alternatives is correct

Question 2

In simple linear regression, the numbers of unknown constants are:

Accepted Answer

Two

Answer

One

Answer

Three

Answer

Four

Question 3

The base price is taken into account in working out the price index

Accepted Answer

100

Answer

200

Answer

300

Answer

400

Question 4

The mean marks of 100 students were found to be 40. Later on it was discovered that a score of 53 was misread as 83. The correct mean will be-

Accepted Answer

39.7

Answer

39.8

Answer

39.9

Answer

None of the above

Question 5

The total area of a normal distribution between the average value ±1.96 of standard deviation is

Accepted Answer

95%

Answer

95.45%

Answer

99%

Answer

68.34%

Question 6

In one series of statistics the class interval 0-10, 10-20, 20-30, 30-40 has been fixed it is what type of series?

Accepted Answer

Continuous exclusive series

Answer

Individual series

Answer

Discrete series

Answer

Continuous inclusive series

Question 7

The glossary is the list of

Accepted Answer

subjects covered in the report

Answer

technical terms used in the report

Answer

references

Answer

diagrams used in the report

Question 8

Which of the following relating to normal distribution are not correct? (i) Co-efficient of skewness is three. (ii) It is mesokurtic. (iii) Mean deviation for it is $$\frac{2}{3}$$σ. (iv) μ ± 2σ covers 94.45% area. (v) Mean, median and mode are equal. (vi) The standard normal variate z has mean one and SD zero.

Accepted Answer

(i), (iii) and (vi)

Answer

(iii), (iv) and (v)

Answer

(i), (iii) and (v)

Answer

(i), (iii) and (iv)

Question 9

If A is a perfect subset of B and P(a < Pb), then P(B - A) is equal to:

Accepted Answer

P(b) - P(a)

Answer

P(a)/P(b)

Answer

P(a) × P(b)

Answer

P(a) + P(b)