The Chief Examiner reported that this question was very popular among the candidates and their performance was commended. According to the report, their responses showed that they understood this aspect of the syllabus.
Candidates were reported to have obtained the following table correctly.
Class
Interval |
Class
Mark |
Tally |
Frequency
(f) |
fx |
|x-| |
f| x- |
20 - 29 |
24.5 |
׀׀׀ |
3 |
73.5 |
36 |
108 |
30 - 39 |
34.5 |
׀׀׀ |
3 |
103.5 |
26 |
78 |
40 – 49 |
44.5 |
׀׀׀׀ ׀׀׀׀ |
9 |
400.5 |
16 |
144 |
50 – 59 |
54.5 |
׀׀׀׀ ׀׀׀׀ |
9 |
490.5 |
6 |
54 |
60 – 69 |
64.5 |
׀׀׀׀ ׀׀׀׀ |
9 |
580.5 |
4 |
36 |
70 – 79 |
74.5 |
׀׀׀׀ ׀׀׀׀ |
10 |
745.0 |
14 |
140 |
80 – 89 |
84.5 |
׀׀׀ |
3 |
253.5 |
24 |
72 |
90 – 99 |
94.5 |
׀׀׀׀ |
4 |
378.0 |
34 |
136 |
|
|
|
Σf = 50 |
Σfx = 3025 |
|
Σf |x-|=
768 |