+1995 What is the standard deviation of the data set?
5, 9, 11, 4, 8, 9, 12
Round the answer to the nearest tenth.
2.7
2.9
3.0
8.2
I think it is 2.7
+37146 First find the mean of the list of numbers
5 + 9 + 11 +4 +8 + 9 + 12 / 7 = 8.286
Now subtract the mean from each number
-3.286 .714 2.714 -4.286 -.286 .714 3.714 Now square all of these numbers
then add that together and find the mean
then take the square root to find
S.D. = 2.7
