Question

28, 30, 65
Find the number of data items for each average and su
Average is 6 and sum of values is 126​

Answer 1

Answer:

Explanation:

To find the standard deviation of a set of numbers, first find the mean (average) of the set of numbers:

110+15+7+134=11.25

Second, for each number in the set, subtract the mean and square the result:

(10−11.25)2+(15−11.25)2+(7−11.25)2+(13−11.25)2=36.74

Then add all of the squares together and find the mean (average) of the squares, like this:

36.744=9.19

Finally, take the square root of the second mean: 9.19−−−−√=3.03.