Class Activity 5 For the following set of data, calculate the a. Range b. Variance c. Standard Deviation Set of Data: 5,3,7,9,5,10,1,6. Solution: Step 1. Find the mean Step 2. Subtract the mean value from individual value in data set Step 3. Squaring the values we get from step 2 Step 4. Add the values from step 3 The sum is your variance Now, finding the standard deviation: Divide the variance by the number of set of data, the result is your standard deviation