Find the population standard deviation (σ not s) for the data set: {75,80,90,95,75,85,55,80,90,95}
round your answer to the nearest 10th.

The steps to work out standard deviation is as follows

Step 1: Find the mean of the data



Step 2: Subtract the mean from each data value












Step 3: Add up the answers from step 2



Step 4: Divide the answer is step 3 by the number of data



Step 5: Square root the answer in step 4

Did u want to find the value of x?

What am i doing here. add?