General Mathematics Paper 2,May/June. 2013

Questions:	1	2	3	4	5	6	7	8	9	10	11	12	13	Main

General Comments
Weakness/Remedies
Strength

Question 11

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Observation

The Chief Examiner reported that this question was very popular among the candidates. According to the report, while majority of the candidates could draw the cumulative frequency table and the cumulative frequency curve, calculating the 60th percentile and the probability posed some problems to many of them.
The cumulative frequency table was given as:

Marks	Class Boundary		Frequency (f)	Cum. freq. (C F)
Marks	lower	Upper	Frequency (f)	Cum. freq. (C F)
1 – 10	0.5	10.5	2	2
11 – 20	10.5	20.5	3	5
21 – 30	20.5	30.5	5	10
31 – 40	30.5	40.5	13	23
41 – 50	40.5	50.5	19	42
51 – 60	50.5	60.5	31	73
61 – 70	60.5	70.5	13	86
71 – 80	70.5	80.5	9	95
81 - 90	80.5	90.5	4	99
91 - 100	90.5	100.5	1	100

Using the table, the cumulative frequency curve would be drawn with cumulative frequencies on the y-axis and the upper class boundaries on the x-axis.