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# WK Five

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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     26.1

To 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.

By Day 7

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.

## Description

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     26.1

To 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.

By Day 7

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…….

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