A repeated-measures experiment comparing only two treatments can be evaluated with either a t statistic or an ANOVA. As we found with the independent-measures design, the t test and the ANOVA produce equivalent conclusions, and the two test statistics are related by the equation
Subject | Treatment 1 | Treatment 2 | Difference |
1 | 2 | 4 | +2 |
2 | 1 | 3 | +2 |
3 | 0 | 10 | +10 |
4 | 1 | 3 | +2 |
a. Use a repeated-measures t statistic with
b. Use a repeated-measures ANOVA with
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