exam3f15_solution.xls

# exam3f15_solution.xls - Exam 3 Fall 2015 Problem 1 Small...

• Test Prep
• 2
• 100% (1) 1 out of 1 people found this document helpful

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

Exam 3 Fall 2015 Problem 1 Small sample size inference: capacitance in nF 1.526 1.363 1.473 1.578 1.655 1.614 1.388 1.487 Mean = 1.511 nF Standard Deviation = 0.104 nF Alpha = 0.05 2.364624 CI Interval for pop mean 1.511 + / - 0.0866 1.424 , 1.597 Mean not > 1.500 nF 0.286704 < 2.364624 Mean > 1.500 nF P-value = 0.39132 Conclusion: Insufficient evidence to conclude that the mean capacitance of all capacitors in this batch > 1.500 nF Assumptions: The distribution of batch capacitors is normal and the sample of eight capacitors was random. CI Interval for pop variance 16.01276 1.689869 0.004691 < < 0.044447 0.068488 < Sigma < 0.210825 Assumptions: The distribution of batch capacitors is normal and the sample of eight capacitors was random. However, the CI for the variance is much more sensitive to depatures of normality than the CI of the mean!! So the mean CI is probably more reliable. Problem 2 Independent Small samples Sample size: n = 5 for both sand blasted with and without epoxy resin Slant Shear Test shear in Mpa Without epoxy resin With epoxy resin mean = 14.3 11.57 standard deviation = 1.22 0.30 Alpha = 0.05 pooled variance = 0.7892 1.859548 Mean without epoxy not > Mean with epoxy 4.858913 > 1.859548

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

This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern