Measures of Dispersion - Jamb Mathematics Past Questions and Answers

Question 41:

• JAMB 2011

\(\begin{array}{c|c}
Class Interval & 3 - 5 & 6 - 8 & 9 - 11 \\ \hline Frequency & 2 & 2 & 2 \end{array}\). Find the standard deviation of the above distribution.

A. √5
B. √6
C. √7
D. √2

Question 42:

• JAMB 2012

Find the range of 4,9,6,3,2,8,10 and 11

A. 11
B. 9
C. 8
D. 4

Question 43:

• JAMB 2012

Find the standard deviation of 2,3,8,10 and 12

A. 3.9
B. 4.9
C. 5.9
D. 6.9

Question 44:

• JAMB 2013

If the variance of 3+x, 6, 4, x and 7-x is 4 and the mean is 5, find the standard deviation

A. \(\sqrt{3}\)
B. 2
C. 3
D. \(\sqrt{2}\)

Question 45:

• JAMB 2013

\(\begin{array}{c|c} Score & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Frequency & 1 & 0 & 7 & 5 & 2 & 3 & 1 & 1 \end{array}\)
The table above shows the scores of 20 students in further mathematics test. What is the range of the distribution?

A. 7
B. 6
C. 3
D. 10