{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

IEE380Summer09_Q7_Solutions

IEE380Summer09_Q7_Solutions - IEE 380 Summer 2009 Quiz#7A...

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

View Full Document Right Arrow Icon
IEE 380 Summer 2009 Name:__________________________ Quiz #7A The time to complete a manual task in a manufacturing operation is considered to be a normally distributed random variable with known standard deviation of .05 minutes. A sample of 5 is taken: .49 min, .52 min, .50 min, .46 min and .49 min. a. Show the null and alternative hypotheses to test if the population mean is < .50 min. b. What is your conclusion? Show all math and clearly state the conclusion in words. Use α = . 05 Part a: H 0 : μ = .50 H 1 μ < .50 For part b, Reject H 0 if z 0 < -1.65 because z .05 = 1.65 IEE 380 Summer 2009 Name:__________________________ Quiz #7B The viscosity of a fluid is a normally distributed random variable with known variance of .06 centipoise 2 . Six samples of this fluid are taken (all in units of centipoise): 1.3, 1.4, 1.4, 1.2, 1.3, 1.3. a. Show the null and alternative hypotheses to test if the population mean is > 1.20 centipoise. b. What is your conclusion? Show all math an clearly state the conclusion in words. Use α = .05 Part a: H 0 : μ = 1.2 H 1 μ > 1.2 For part a, Reject H 0 if z 0 > 1.65 because z .05 = 1.65 357 .
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