Question

. Find the standard deviation of each data set. A = {3, 5, 7, 9, 11, 12, 12} B = {1, 2, 2, 5, 5, 9, 13} C = {2, 5, 8, 9, 12, 13, 17}

Answer 1

Answer:
8.429
Explanation:
A = {3, 5, 7, 9, 11, 12, 12}
The standard deviation is: 3.289
First find the sum, which is: 59

Then find the mean, which is: 59 divided by the amount of numbers given which is 7.
So: 59/7 = 8.429

Then you have to find the variance by using the equation:
variance^2 = [(number1 - mean)^2 + ... + ] / the count
V^2 = [(3 - 8.429)^2 + (5 - 8.429)^2 + ( 7 - 8.429)^2 + (9 - 8.429)^2 + (11 - 8.429)^2 + (12 - 8.429)^2 + (12 - 8.429)^2] all divided by 7
which equals: 10.816
the variance is the square root of 10.816 which equals 8.429
DO THE SAME THING WITH THE OTHERS
IF YOU SEARCH STANDARD DEVIATION CALCULATOR ONLINE YOU CAN FIND SOMETHING TO HELP YOU

Please let me know if this helps!!