Measures of Dispersion - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 2019

Score(x)	0	1	2	3	4	5	6
Freq(f)	5	7	3	7	11	6	7

Find the variance

A. 3.42
B. 4.69
C. 4.85
D. 3.72

Question 2:

• JAMB 2019

This table below gives the scores of a group of students in a Further Mathematics Test.

Score	1	2	3	4	5	6	7
Frequency	4	6	8	4	10	6	2

Calculate the mean deviation for the distribution

A. 4.32
B. 2.81
C. 1.51
D. 3.90

Question 3:

• JAMB 2017

Find the range of the following set of numbers 0.4, −0.4, 0.3, 0.47, −0.53, 0.2 and −0.2

A. 1.03
B. 0.07
C. 0.03
D. 1.0

Question 4:

• JAMB 2017

Find the sum of the range and the mode of the set of numbers 10, 9, 10, 9, 8, 7, 7, 10, 8, 10, 8, 4, 6, 9, 10, 9, 7, 10, 6, 5

A. 16
B. 14
C. 12
D. 10

Question 5:

• JAMB 2019

Score (x)	0	1	2	3	4	5	6
Freq (f)	5	7	3	7	11	6	7

Find the variance


A. 3.42
B. 4.69
C. 4.85
D. 3.72