At a summer camp an arithmetic test is taken by 250 children. The times taken, to the nearest minute, to complete the test were recorded. The results are summarised in the table.
| Time taken, in minutes | 1-30 | 31-45 | 46-65 | 66-75 | 76-100 |
| Frequency | 21 | 30 | 68 | 86 | 45 |
(a) Question
Draw a histogram to represent this information.
Answer/Explanation
Ans:
| Class Width | 30 | 15 | 20 | 10 | 25 |
| Frequency Density | 0.7 | 2 | 3.4 | 8.6 | 1.8 |
(b) Question
State which class interval contains the median.
Answer/Explanation
Ans:
66 – 75