Basic Tools - Jamb Economics Past Questions and Answers

Question 11:

• JAMB 2019

If the standard deviation of a given data is 8.2, find its variance_______________

A. 82.0
B. 91.8
C. 67.2
D. 4.1

Question 12:

• JAMB 2017

a formula used to calculate for ____________

A. Variance
B. The quartile
C. Standard deviation
D. Mean deviation

Question 13:

• JAMB 2017

The modal value of 3, 8, 4, 6, 3, 5, 2, 7, 3 and 5 is

A. 6
B. 3
C. 4
D. 5

Question 14:

• JAMB 2017

Given that ∑fx = 340 and N = 20, find the arithmetic mean.

A. 20
B. 17
C. 32
D. 9

Question 15:

• JAMB 2016

Which of the following is a set of measures of dispersion?

A. Mean and median
B. Mean and standard deviation
C. Range and variance
D. Mode and mean