One-way ANOVA
- Is used to test the claim that three or more population means are equal.
- It is called one-way because each value is classified in exactly one way.
- Eg: Comparison by gender, race, political party, color, etc..
- Note: For one-way ANOVA
a) Null hypothesis means all Mean are equal
b) Alternate hypothesis means at least one of the means is different.
Conditions or Assumptions for one-way ANOVA
a) Data are randomly sampled.
b) Variance of each sample are assumed equal.
c) The residuals are normally distributed.
Sources of variation
a) Variation between the groups
b) Variation within groups also called error variation.