9709 P62 - Nov 2009 - Q6
2408
The following table gives the marks, out of 75, in a pure mathematics examination taken by 234 students.
| Marks | 1–20 | 21–30 | 31–40 | 41–50 | 51–60 | 61–75 |
|---|---|---|---|---|---|---|
| Frequency | 40 | 34 | 56 | 54 | 29 | 21 |
(i) Draw a histogram on graph paper to represent these results.
(ii) Calculate estimates of the mean mark and the standard deviation.
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