1 The weights of 30 children in a class, to the nearest kilogram, were as follows.
50
45
61
53
55
47
52
49
46
51
60
52
54
47
57
59
42
46
51
53
56
48
50
51
44
52
49
58
55
45
Construct a grouped frequency table for these data such that there are five equal class intervals with the first class having a lower boundary of 41.5 kg and the fifth class having an upper boundary of 61.5 kg .