Calculate the mean, Difference from Mean, squared difference from mean, standard deviation

SD: # Mean: X Difference Test: from X Squared HbG 1 12.0 Difference from X Range +/- 2SD Range +/- 3SD 2 12. 0 Range +/- 1SD 3 12 . 2 4 12.2 5 11.8 Procedure for calculating mean and standard deviation: 6 11.8 1. Record control data into the first column 7 11.7 2. Find the sum of column one by adding all values together 8 12.0 3. Calculate the average, X 9 4. Calculate and record in column two 12 . 1 individual differences from the average 10 12. 6 5. Square each individual difference in column two, and record in column three 11 12.0 6. All column three to get the total 12 12.0 7. Calculate the Standard Deviation using the equation below 13 11.9 14 12.2 X = each individual measurement N = total number of measurements 15 12. 0 X = mean 16 11.8 Mean = Sum of X 17 12.0 N 18 12 . 1 Standard Deviation = 19 12. 1 Sum of Squared Difference from X 20 1 2.0 N-1 Sum