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University of Phoenix Material
Week 4 Practice Worksheet
a response to the following questions.
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
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
est: two-sample assuming unequal variances.
The next table shows the results of this independent
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
test for a single sample but who is unfamiliar with the
test for independent means.