SOURCEBOOK

R | Data Analysis

One Way ANOVA

Prior to the steps below, enter the data as appropriate for the analyses (described elsewhere).

Obtaining Descriptive Statistics

Get the mean and standard deviation of the dependent variable for each of the levels.

by(Outcome,Factor,mean)
by(Outcome,Factor,sd)

Results <- aov(Outcome~Factor)
model.tables(Results,"means")

Obtaining Inferential Statistics

Get the analysis of variance source table with test of statistical significance.

summary(Results)