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

Test: Mean: HCI SD # X Difference Squared from X Range +/- 1SD 1 36- 2 Difference from X Range +/- 2SD Range +/- 3SD 2 36.0 3 35. 5 4 |35. 8 Procedure for calculating mean and 5 36. 0 standard deviation: 6 3 604 1. Record control data into the first column 2. Find the sum of column one by adding 7 36. 8 all values together 8 36.0 3. Calculate the average, X 4. Calculate and record in column two 9 35. 0 individual differences from the average 10 34 . 2 5. Square each individual difference in column two, and record in column three 11 34 . 4 6. All column three to get the total 7. Calculate the Standard Deviation using 12 34 . 8 the equation below 13 35 0 14 36.4 X = each individual measurement N = total number of measurements 15 / 36 . 6 X = mean 16 36. 0 17 37 , 0 Mean = Sum of X N 18 37. 4 19 36 . 0 Standard Deviation = 20 35. 8 Sum of Squared Difference from X N-1 Sum