PS296 Lecture Notes - Lecture 19: John Tukey, Null Hypothesis
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Step 8: write a conclusion that answers the question when spss output is available: Our analysis of variance at alpha = . 05 testing the effectiveness of three pain relievers (a, b & c) and a placebo yielded a significant result, f (3, 8) = 9. 00, p = . 006. Therefore, the treatment had an effect on pain relief, as measured by self reported pain relief scores. At least one of the group means (mplacebo = 1. 00, sd = 1. 73; ma = 1. 00, sd = 1. 00; mc = 4. 00, sd = 100; mc = 6. 00, sd = 1. 73) is significantly different than another group mean. If not given spss, don"t state sd of each factor and don"t use exact p value. Techniques used to compare specific groups (i. e. group means) following a significant anova. Allow you to determine which group(s) is(are) different from another group. Ex fisher"s least significant difference (lsd), bonferroni, tukey.
