class frequency 0 13 1 23 2 28 3 24 4-7 28 8-11 50 12-16 37 17-19 22 20-27 9 28-
ID: 2917897 • Letter: C
Question
class frequency0 13 1 23 2 28 3 24 4-7 28 8-11 50 12-16 37 17-19 22 20-27 9 28-37 8 38-47 3
calculate mean for the following class frequency
0 13 1 23 2 28 3 24 4-7 28 8-11 50 12-16 37 17-19 22 20-27 9 28-37 8 38-47 3
calculate mean for the following
Explanation / Answer
For classes with intervals you simply have to take the mean ofthe interval multiply with the corresponding sum up for everyclass, and divide by the total number of observations. Sobasically,
0 x 13 + 1 x 23 + 2 x 28 + 3 x 24 + 5.5 x 28 + 9.5 x 50 + 14 x37 + 18 x 22 + 23.5 x 9 + 32.5 x 8 +42.5 x 3 = 2265
and 245 observations so mean = 2293/245 = 9.3592
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