Week Four Practice Problems Prepare a written response to the following questions. 14. For each of the following studies, say whether you would use a test for dependent means or

Week Four Practice Problems Prepare a written response to the following questions. 14. For each of the following studies, say whether you would use a test for dependent means or a test for independent means. a. A researcher measures the heights of 40 university students who are the firstborn in their families and compares the 15 who come from large families to the 25 who come from smaller families. b. A researcher tests performance on a math skills test of each of 250 individuals before and after they complete a one-day seminar on managing test anxiety. c. A researcher compares the resting heart rate of 15 individuals who have been taking a particular drug to the resting heart rate of 48 other individuals who have not been taking the drug. 24. Rosalie Friend (2001), and educational psychologist, compared three methods of teaching writing. Students were randomly assigned to three different experimental conditions involving different methods of writing a summary. At the end of the two days of instructions, participants wrote a summary. One of the ways it was scored was the percentage of specific details of information it included from the original material. Here is a selection from her article describing one of the findings: The effect of summarization method on inclusion of important information was significant (2, 144) = 4.1032, < .019. The mean scores (with standard deviations in parantheses) were as follows: Argument Repetition, 59.6% (17.9); Generalization, 59.8% (15.2); and Self-Reflection, 50.2% (18.0). (p.14) a. Explain these results to a person who has never had a course in statistics. b. Using the information in the preceding description, figure the effect size for the study. Copyright ©2013 by Pearson Education, Inc.  All rights reserved.  Used with permission.

Do you need us to help you on this or any other assignment?


Make an Order Now