Calculate the mean and standard deviation for the following data:
Neck circumference
(in inches)
12 12.5 13 13.5 14 14.5 15 15.5 16
Frequency
5 20 30 43 60 56 37 16 3
To find the mean and standard deviation we will calculate the following table,
Here assumed mean
Now the formula for mean is,
The required mean is
Again the formula for standard deviation is ,
The required standard deviation is
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