This article was originally published on Built In by Eric Kleppen. Variance is a powerful statistic used in data analysis and machine learning. It is one of the four main measures of variability along ...

Analysis of variance (ANOVA) is a statistical analysis tool that separates total variability found within a data set into two components: random and systematic factors.

When collecting sets of numeric data that represent sales, customer survey results or other business-related outcomes, you can divide your values in four segments called quartiles. These data ...