For the following set of data, find the number of data within 1 population standard deviation of the mean.
Data Frequency
10
1
12
6
14
12
15
12
19
18
20
13
26
10
29
6
33
1

I’m tome

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,