PSY230-M5Assignment-FallB2018.docx - PSY230 FallB2018 M5...

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PSY230FallB2018M5 AssignmentGeneral instruction:1.Complete the Practice Problem first, if you have not done so. It will help you become proficient in answering the questions here.2.Check out the “Assignment Guides” in the Navigation menu in Blackboard to see how to properly show your math work, instruction on essential procedures in Word and Excel, and APA formatting examples.3.Use this document to fill in the answers to the questions. You must type out a clear answer to each question, even if the answer is also contained in the Excel file submitted to show work.Q1) Independent-Samples t Test (20 points total)A high school teacher would like to know whether students who have participated in a test prep programscore significantly higher on a standardized test than those who have not participated in such a program.She collects the percentile scores from a test prep group of 10 students and a control group (no test prep) of 10 students. Both groups contain only female students and all students have similar school grades. The teacher thinks that the test prep group should out-perform the control group on the standardized test but would like to leave the hypothesis non-directional and run a two-tailed test, which is more stringent. She sets the significance level at α = .05. For the questions below, the prep group is designated as sample 1 (drawn from population 1) and the control group is designated as sample 2 (drawn from population 2).Prep group IDTest scoreControl group IDTest scoreP184C176P280C273P387C382P490C480P577C572P680C677P782C780P886C868P981C980P1083C1082a. What is the dependent (outcome) variable? What is the independent (grouping) variable? (2 points total: 1 for each variable) DV: The students test scores IV: The studentsb. Create the null and alternative hypotheses (non-directional) for this study, using both words and symbol notation (2 points total: 1 for each hypothesis, with .5 for written and .5 for symbol notation)

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