Question: how to calculate sample mean x bar?
Answer: Step 1: Find the mean (the average) of the data set: (170.5 + 161 + 160 + 170 + 150.5) / 5 = 162.4. Step 2: Calculate the deviation from the mean by subtracting each value from the mean you found in Step 1. Step 5: Divide the number you found in Step 4 by your sample size – 1.