We have run a one-way ANOVA comparing three treatments for anorexia and found a significant difference. We now want to convey the most useful information to our reader about how effect one treatment is relative to one or more other treatments. The best statistic to use here to convey that information would most likely be A) computed on one or more pairs of groups. B) η ² computed on all three groups. C) w ² computed on all three groups. D) none of the above

Question

Quizplus · Accepted Answer

The most useful statistic to convey the difference between two or more treatments would be a post-hoc test like Tukey's HSD or Bonferroni corrected t-tests, which compute the difference between pairs of groups and determine if those differences are statistically significant. Therefore, choice A, which mentions a statistic computed on one or more pairs of groups, is the best choice. Choices B and C mention statistics computed on all three groups, which do not provide information on the specific differences between treatments. Therefore, they are not the best choices in this scenario.

We Have Run a One-Way ANOVA Comparing Three Treatments for Anorexia