9709 P63 - Jun 2014 - Q1
2370
Some adults and some children each tried to estimate, without using a watch, the number of seconds that had elapsed in a fixed time-interval. Their estimates are shown below.
| Adults | 55 | 58 | 67 | 74 | 63 | 61 | 63 | 71 | 56 | 53 | 54 | 78 | 73 | 64 | 62 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Children | 86 | 95 | 89 | 72 | 61 | 84 | 77 | 92 | 81 | 54 | 43 | 68 | 62 | 67 | 83 |
- Draw a back-to-back stem-and-leaf diagram to represent the data.
- Make two comparisons between the estimates of the adults and the children.
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