Test Index

JAMB Mathematics 2019 Paper

© africaexams.com

Question : 57

Total: 73

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

4.32
2.81
1.51
3.90

Solution:

Score(x)	1	2	3	4	5	6	7	Total
Frequency (f)	4	6	8	4	10	6	2	40
fx	4	12	24	16	50	36	14	156
x - $\overline{x}$	-2.9	-1.9	-0.9	0.1	1.1	2.1	3.1
\|x - $\overline{x}$ \|	2.9	1.9	0.9	0.1	1.1	2.1	3.1
f\|x - $\overline{x}$ \|	11.6	11.4	7.2	0.4	11	12.6	6.2	60.4

Mean = $\frac{\sum fx}{\sum f}$

= $\frac{156}{40}$

= 3.9

M.D = $\frac{\sum f |x - \overline{x}|}{\sum f}$

= $\frac{60.4}{40}$

= 1.51

© africaexams.com

Go to Question:

Prev Question

Next Question