Statistics

where X_i is a measurement in the population and N is the total number of X_i in the population. For a sample of size n the sample mean, denoted X ¯ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203743102/9cca8f32-4688-4a1e-80c2-a6c9068f5153/content/eq465.tif"/> , is X ¯ = ∑ X i n . https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203743102/9cca8f32-4688-4a1e-80c2-a6c9068f5153/content/eq466.tif"/>