{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

PS8 - ISMT111 Problem Set#8(1 A random sample of 80 sales...

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

View Full Document Right Arrow Icon
ISMT111 Problem Set #8 (1) A random sample of 80 sales accounts of firm A showed 24 accounts to be in error, while a random sample of 150 sales accounts of firm B showed 15 accounts to be in error. Let p 1 and p 2 be the proportion of sales accounts in error for firm A and Firm B respectively. Determine a 90% confidence interval estimate for p 1 - p 2 . (2) A study of reading habits of college graduates and non-graduates is to be taken. An equal number of individuals in each category will be randomly selected and each will be asked to report on the number of books read during the following year. On the basis of past studies of reading habits, the investigators feel that values of σ g = 20 and σ n = 15 (i.e., grads and nongrads respectively) are conservative. What should the sample size be if the 95% confidence interval for the difference in true average number of books read is to be at most of width 5? (3) Independent random samples were drawn from two normal populations with means μ 1 and μ 2
Image of page 1

Info icon This 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.

{[ 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