Dissecting 1-Way ANOVA and ANCOVA with Examples in R

ANOVA (Analysis of Variance) is a process to compare the means of more than two groups. It can also be used for comparing the means of two groups. Comparing the means between two groups only can be done using a hypothesis testing method such as a t-test. This article will focus on comparing the means of more than two groups using the Analysis of Variance (ANOVA) method. This method breaks down the overall variability of a given continuous outcome into pieces. One way ANOVA is applicable where groups are defined based on the value of one factor.