HW7E_SaraPoet_PSYCH354B01

# HW7E_SaraPoet_PSYCH354B01 - PSYC 354 HOMEWORK 7 Confidence...

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PSYC 354 H OMEWORK 7 Confidence Intervals, Effect Size, and Statistical Power When submitting this file, be sure the filename includes your full name, course and section. Example: HW7_JohnDoe_354B01 Be sure you have reviewed this module/week’s lesson and presentations along with the practice data analysis before proceeding to the homework exercises. Complete all analyses in SPSS, then copy and paste your output and graphs into your homework document file. Answer any written questions (such as the text-based questions or the APA Participants section) in the appropriate place within the same file. Part I: Concepts Questions 1–8: Answer the questions in the spaces provided. Part I: Questions 1a–1e Fill in the highlighted blanks with the best word or words. 1-a) The confidence interval is centered around the __mean___ of the sample. 1-b) Cohen‘s d measures the difference between means in terms of __standard deviation, not standard error__ . 1-c) According to Cohen‘s conventions, a d value of __appropriate measure of effect size for a z statistic___ indicates a large effect. 1-d) A study that calculates the mean effect size from the individual effect sizes of many studies is called a(n) _meta-analysis___ . 1-e) Statistical power refers to the probability of successfully rejecting the _null hypothesis. Part I: Questions 2–5 End-of-chapter problems: Complete the following problems. If applicable, remember to show work in your homework document to receive partial Page 1 of 8

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PSYC 354 credit. 2) List five factors that affect statistical power. For each, indicate how a researcher can leverage/manipulate that factor to increase power in a study.
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