来自MSN1 个月
Standard Deviation vs. Variance: What’s the Difference?
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 ...
isixsigma on MSN5 个月
Homogeneity of Variance and Statistical Inference: What You Need to Know
Homogeneity of variance is the assumption that your data sets are equal in variance. It allows for the validation of ...
Nature5 个月
What is principal component analysis?
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 ...