STATISTICS - Jamb Mathematics Past Questions and Answers

Question 316:

• JAMB 2013

Find the mean of t + 2, 2t - 4, 3t + 2 and 2t.

A. T + 1
B. 2t
C. 2t + 1
D. T

Question 317:

• JAMB 2013

The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 and 18, find the mode.

A. 6
B. 8
C. 14
D. 2

Question 318:

• JAMB 2013

\(\begin{array}{c|c}Age & 20 & 25 & 30 & 35 & 40 & 45 \\
\hline \text{No. of people} & 3 & 5 & 1 & 1 & 2 & 3 \end{array}\)
Calculate the median age of the frequency distribution in the table above

A. 25
B. 30
C. 35
D. 20

Question 319:

• 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 320:

• 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