Standard deviation

Find standard deviation for dataset (grouped data):

Age (years) No. Of Persons
0-10 15
10-20 15
20-30 23
30-40 22
40-50 25
50-60 10
60-70 5
70-80 10

Result

s =  19.758

Solution:

Solution in text s =







Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

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#1
Dr Math
Check also with our stddev calculator - input is given as frequency table:

https://www.hackmath.net/en/calculator/standard-deviation?input=5+15+25+35+45+55+65+75%0D%0Af%3A15+15+23+22+25+10+5+10

x is Mid Interval Value and f is frequency

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