The table gives the distribution of marks of 60 candidates in a test. Marks 23-25 26-28 29-31 32-34 35-37 38-40 Frequency 3 7 15 21 10 4 (a) Draw a cumulati...
Question 1 Report
The table gives the distribution of marks of 60 candidates in a test.
| Marks | 23-25 | 26-28 | 29-31 | 32-34 | 35-37 | 38-40 |
| Frequency | 3 | 7 | 15 | 21 | 10 | 4 |
(a) Draw a cumulative frequency curve of the distribution.
(b) From your curve, estimate the : (i) 80th percentile ; (ii) median ; (iii) semi-interquartile range.
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