Question
The table shows the time, t minutes, that each of 50 customers spent in a shop.
[5 marks]
| Time (t minutes) | Frequency |
|---|---|
| 0 < t ≤ 10 | 8 |
| 10 < t ≤ 20 | 15 |
| 20 < t ≤ 30 | 12 |
| 30 < t ≤ 40 | 9 |
| 40 < t ≤ 50 | 6 |
(a)Calculate an estimate of the mean time spent in the shop.
(b)Write down the class interval that contains the median time.
This question has 2 parts. You don't have to get them all — each part you answer earns its own marks. Write them as (a) … ; (b) … , or just send the one part you worked out.
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