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Learning Goal: I’m working on a business multi-part question and need an explanation and answer to help me learn.Assignment: Testing a Manufacturer’s MPG Claim: Part 2 Note: Last week, you submitted Part 1 of this Assignment. This week, you will complete and submit only Part 2 (including the Conclusion).Companies often develop and test hypotheses
about their products. For example, car manufacturers will test their
cars to determine fuel efficiency and miles per gallon. To ensure that
products are safe and that they perform as advertised, regulatory and
consumer protection groups also test companies’ claims.For this Assignment, you are working at a firm
that conducts independent testing for heavy industry. Recently, an
automobile manufacturer has been in the news for complaints about the
highway gas mileage of their latest model minivan. You receive a
contract from a consumer action group to test and write a report on the
company’s claim that its minivans get 28 miles per gallon on the
highway. The car company agrees to allow you to select randomly 35
low-mileage fleet minivans to test their highway mileage. Your test
results gave you the following data: 29.7 24.5 27.1 29.8 29.2 27.0 27.8 24.1 29.3 25.9 26.2 24.5 32.8 26.8 27.8 24.0 23.6 29.2 26.5 27.7 27.1 23.7 24.1 27.2 25.9 26.7 27.8 27.3 27.6 22.8 25.3 26.6 26.4 27.1 26.1To prepare for this Assignment:Review this week’s Learning Resources.
Refer to your Week 4 Assignment in order to complete the Conclusion section of this Assignment.
Refer to the Academic Writing Expectations for 2000/3000-Level Courses as you compose your Assignment.
Submit Part 2 of your report (including the Conclusion) according to the following prompts.Part 2: Hypothesis Testing: Two-Tail Test and One-Tail Test Complete the following and include your results and responses in your report (use alpha = 0.05):List the null and alternative hypotheses for the two-tail test for
the mean. Calculate the observed value of the test statistic and the
associated p-value. (75–150 words, or 1–2 paragraphs) Is the observed test statistic in the critical region? Is the
p-value higher or lower than your alpha? (75–150 words, or 1–2
paragraphs)
Note: Include your calculations. If your calculations are submitted separately, make note of where they can be found.
List the null and alternative hypotheses for the one-tail test of
the mean. Calculate the observed value of the test statistic and the
associated p-value. (75–150 words, or 1–2 paragraphs)Is the observed test statistic in the critical region? Will the
p-value be higher or lower than your alpha? (75–150 words, or 1–2
paragraphs)
Note: Include your calculations. If your calculations are submitted separately, make note of where they can be found.
ConclusionsIn your report, use the confidence
interval information and the results of the hypothesis testing to
provide support for your conclusions and recommendations to the company.
Specifically: What conclusions did you reach? What did you learn about the
situation by using each method? Did one method offer more conclusive
proof than another? (150–225 words, or 2–3 paragraphs)
Based on your results, do you support the company’s claim that their minivans get 28 miles per gallon? (75 words, or 1 paragraph)
Summarize the details of your test methods and the results from each
statistical method you used. Explain the findings so that executives
from both the agency and the company can understand your conclusion.
(150–225 words, or 2–3 paragraphs)
Finally, present recommendations for actions that the company might
take to use your findings to better serve their customers in the future.
(75 words, or 1 paragraph)
Requirements: 4 pages