Exam 3 Review Sheet

Decisions about hypothesis testing similar to exam

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Unformatted text preview: nce level, p ­value, critical values How do you find the corresponding t ­score (critical/cutoff value)? What information is needed to determine the critical value on a t table? If we get a result more extreme then the t ­score, what can we conclude? What does this mean conceptually? Decisions about hypothesis testing [Similar to Exam 2… still important] Directional versus non ­directional hypotheses; One ­tailed vs. two ­tailed tests Know how to select the appropriate approach for your research hypothesis Effect size Calculation for Estimated d (effect size) for t test of independent means Be able to interpret effect size based on conventional cut ­offs for small, medium, and large effect sizes Power Understand power conceptually What does it mean to have 20% power? 80% power? 100% power? What influences power (i.e., what is represented in a power table)? Be able to use a power table to: Plan a study (e.g., Determine needed number of participants) Evaluate non ­significant results of study (e.g., Was there enough power?) Reporting results Understand how to interpret the results of a t test that are reported in a table or in words, as would be done in a research article....
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