19(a)Measures Location SpreadMedium4 marks
The time spent in a shop by each of 40 customers is recorded.
The table shows the results.
| time ( minutes) | ||||
|---|---|---|---|---|
| frequency | 3 | 18 | 13 | 6 |
Calculate an estimate of the mean time.
Answer
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| time ( minutes) | ||||
|---|---|---|---|---|
| frequency | 3 | 18 | 13 | 6 |
Answer