In this example, N is 10 and N-1 would be 9. The result is a sample variance of 82.5/9 = 9.17 and a population variance of 8.25. Note that the standard deviation is the square root of the variance ...

Everybody understands field goal percentage and three-point percentage. We all know what making 40% of three-point attempts ...

Several measurement techniques used in the life sciences gather data for many more variables per sample than the typical ... My aim with this example is to leave you with an idea of how PCA ...