Lecture 11 Tukey's HSD

Lecture 11 Tukey's HSD - One-Way ANOVA Part 2 Lecture 11...

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Unformatted text preview: One-Way ANOVA Part 2 Lecture 11 Psyc 11 Today One way ANOVA recap and example Tukeys HSD What to expect (and how to study) for Tuesdays exam One-way ANOVA Used when comparing more than two independent groups. There is 1 independent variable and multiple groups (levels, treatments) Examines whether two or more population means are equal, at the same time The F distribution The F distribution (and associated test) is always a 1 tailed test. Basic NHST Procedure 1. Identify the null and alternative hypotheses. 1. Determine what test you will perform (1 sample t test, t test of r vs. 0, two sample t test, ANOVA, etc.) 1. Determine your alpha level, whether your test in 1 tailed or two tailed, degrees of freedom, and find the critical t value in Table D or critical F value in table F. Draw a picture! 1. Conduct a statistical test of the hypothesis. If using ANOVA, create a source table 1. Based on your test, make a decision on whether you will reject or retain the null hypothesis? 1. Interpret your results in clear English (write out your conclusion in symbols and words). Calculating F obtained 1. Calculate means (group and grand) 2. Calculate SS (between, within, total) 3. Calculate df (between, within, total)...
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Lecture 11 Tukey's HSD - One-Way ANOVA Part 2 Lecture 11...

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