Question

Instructions: Ensure that the version number on the Word file and the Excel data file match.

Type your answers in the blank areas. Save the file as “Chapter 8-9 Exam – Your Name”. Submit your completed Word file on Blackboard under the Exam 3 Folder.

22. The manufacturer of a new line of ink-jet printers would like to include as part of its advertising the number of pages a user can expect from a print cartridge. The results from a sample of 14 cartridges can be found in the Excel test data file.

1. What are the point estimates for the population mean and population standard deviation?

____________________________________________

2. Develop a 95% interval for the population mean.

____________________________________________

3. If the point estimate of the population mean and standard deviations are accurate, what is the probability that another sample of 14 cartridges will last an average of more than 1750 pages?

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23. As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 400 applicants, 13 failed the test.

1. Develop a 95% confidence interval for the proportion of applicants that fail the test.

____________________________________________

2. Would it be reasonable to conclude that 6% of applicants fail the drug test? Explain why or why not.

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Page Count

1271

2044

1826

1567

1793

2012

1704

2326

1853

1535

1000

2485

1053

2245

Answer 1