1. Check for randomization and independent samples

2. Check assumptions of normality and equal variance

3. Create an ANOVA table and carry out F-test

4. If you reject the hypothesis that the means are same:

• Conduct a multiple comparison procedure.
• Construct confidence intervals for mean(s)

5. If you fail to reject the hypothesis that the means are same then:

• The treatment means are equal
• The treatment means are not equal. Increase the sample size, consider other factor