# psy315r7_week_4_practice_worksheet FIN.docx - WEEK 4...

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WEEK 4 PRACTICE WORKSHEET 1 Week 4 Practice Worksheet PSY/315 B. Taylor John
[SHORTENED TITLE UP TO 50 CHARACTERS] 2 University of Phoenix Material Week 4 Practice Worksheet Provide a response to the following questions. Note: Each team member should compute the following questions and submit to the Learning Team forum. The team should then discuss each team member’s answers to ascertain the correct answer for each question. Once your team has answered all the questions, submit a finalized team worksheet. 1. Two boats, the Prada (Italy) and the Oracle (USA), are competing for a spot in the upcoming America’s Cup race. They race over a part of the course several times. The sample times in minutes for the Prada were as follows: 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The sample times in minutes for the Oracle were as follows: 14.1, 14.1, 14.2, 17.4, 15.8, 16.7, 16.1, 13.3, 13.4, 13.6, 10.8, and 19.0. For data analysis, the appropriate test is the t t est: two-sample assuming unequal variances. The next table shows the results of this independent t test. At the .05 significance level, can you conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but who is unfamiliar with the test for independent means. t
confidence interval 95.% lower confidence interval 95.% upper margin of error When calculating the average of both sets, we find that one is moving at a faster pace (on average) than the other.
Thus, there would be an pretty noticeable difference in the two sets.