How to Calculate Median, Mode, Mean, Variance, and ...

(read “x bar”) is the mean. n is the number of observations. Xi refers to each of the observations. So if you see Σ (Xi) it means that you need to add up (calculate the sum of) all of the observations. PART 2: Calculating Variance and Standard Deviation. VARIANCE. 1) Calculate the mean (). In this example, mean … ................
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