BSEC 10-25 - 39 Known that 6 The population ={calorie...

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

View Full Document Right Arrow Icon
3 rd test, ch 6 & 7 case A, o=0.10 Zo/z=1.645 case B, o=0.05 Zo/z=1.96 case C, o=0.01 Zo/z=2.575 318 38 46 41. Known that: 1. The population ={repair costs of all broken washing machines} The population mean U (i.e., the average repair cost of all broken machines) us unknown. 2. Sample size, n=40 Sample={x, x1, x2, x3, …} 3. Sample mean X_=$120 4. sample standard deviation, s=$17.50 (X1-x_)^2+(X2-x_)^2….(X40-x_)^2/40-1 5. Confidence level is 1-o=0.95 (95%), o=0.05 The 95% confidence interval for the unknown population mean U (the unknown average repair cost of all broken washing machines) is given by: 120+-(Z0.05/2)*17.5/sqrt40 120+-(1.96)17.5/6.225 120+-5.42 114.58, 125.42 we’re 95% confident that the unkown populaton U (the unknown average repair cost of all broken machines) lies betweem 114.58 & 125.42
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: 39. Known that: 6. The population ={calorie reading of all 8 oz servings} The population mean U (i.e., the average calorie reading of all 8 oz servings) us unknown. 7. Sample size, n=31 Sample={x, x1, x2, x3, …} 8. Sample mean X_=99.3 9. sample standard deviation, s=41 (X1-x_)^2+(X2-x_)^2….(X40-x_)^2/40-1 10. Confidence level is 1-o=0.90 and 0.95 The 90% confidence interval for the unknown population mean U (the unknown average calorie reading of all 8 oz servings) is given by: 99.3+-(Z0.1/2)*41.5/sqrt31 99.3+-(1.645)41.5/5.567 99.3+-12.263 87.037, 111.563 we’re 90% confident that the unkown populaton U (the unknown average calorie reading of all 8 oz servings) lies betweem 87.037 & 111.563 38. 90% 21.99,24.41 95% 21.76, 24.64 46. 99% 97.79, 116.31...
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