1 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.