The mean from the following data
is--
size(below): 5 10 15 20 25 30 35
frequency: 13 13 17 27 36 38
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size f x (midpoint) fx
5-10 13 7.5 97.5
10-15 13 12.5 162.5
15-20 17 17.5 297.5
20-25 27 22.5 607.5
25-30 36 27.5 990
30-35 38 32.5 1235
= 144 = 3390
Mean = 3390/ 144
= 23.5 lies in class 20-25
5-10 13 7.5 97.5
10-15 13 12.5 162.5
15-20 17 17.5 297.5
20-25 27 22.5 607.5
25-30 36 27.5 990
30-35 38 32.5 1235
= 144 = 3390
Mean = 3390/ 144
= 23.5 lies in class 20-25
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