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June 2002 p6 q2
2482
The manager of a company noted the times spent in 80 meetings. The results were as follows.
| Time \((t)\) minutes | \( 0 < t \le 15 \) | \( 15 < t \le 30 \) | \( 30 < t \le 60 \) | \( 60 < t \le 90 \) | \( 90 < t \le 120 \) |
|---|---|---|---|---|---|
| Number of meetings | 4 | 7 | 24 | 38 | 7 |
Draw a cumulative frequency graph and use this to estimate the median time and the interquartile range.
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