Ch 8,9 - 6.2 26 2.01 50 ± 28 is not reasonable because it...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Answers to Assigned Exercises from Chapter 8 21. The difference between a sample statistic and the population parameter. Yes, the difference could be zero. The sample mean and the population parameter are equal. 22. 1. Destructive nature of some tests 2. Physically impossible to check all items 3. Costly to check all items 4. Time consuming to check all items 34. a. 40,000 5657 50 x s = = . b. The distribution will be normal c. 112,000 110,000 0.35 40,000 50 z - = = So probability is 0.3632, found by 0.5000 - 0.1368. d. 100,000 110,000 1.77 40,000 50 z - = = - So probability is 0.9616, found by 0.5000 + 0.4616. e. 0.5984, found by 0.4616 + 0.1368. Answers to Assigned Exercises from Chapter 9 32. a. 3.01 pounds b. 2.9999 and 3.0202 pounds, found by 3.01 2.03(0.03/ 36) ± About 95 percent of similarly constructed intervals would include the population mean. 34. Between 24.24 and 27.76, found by
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 6.2 26 2.01 50 ± . 28 is not reasonable because it is outside of the confidence interval. 46. For the applicants the confidence interval is between 0.021 and 0.107, found by 0.064(1 0.064) 0.064 2.58 . 220 -± It would not be reasonable to conclude that more than ten percent of the applicants are now failing the test because 0.10 is inside the confidence interval. For the employees the confidence interval is between 0.011 and 0.059, found by 0.035(1 0.035) 0.035 2.58 . 400 -± Neither would it be reasonable to conclude that less than five percent of the employees are now failing the test because 0.05 is also inside the confidence interval...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern