{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

HW 7 solutions _1_ - Homework 7 Solutions 10-44 a 1 The...

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

View Full Document Right Arrow Icon
Homework 7 Solutions 10-44 a) 1) The parameter of interest is the mean difference in impurity level, d where d i = Test 1 Test 2. 2) H 0 : 0 d 3) H 1 : d 0 4) = 0.01 5) The test statistic is n s d t d / 0 6) Reject the null hypothesis if t 0 < 7 , 005 . 0 t or t 0 > 7 , 005 . 0 t where 7 , 005 . 0 t = 3.499 7) d 0.2125 s d 0.1727 n 8 48 . 3 8 / 1727 . 0 2125 . 0 0 t 8) Because 3.499 < 3.48 < 3.499 cannot reject the null hypothesis. There is not sufficient evidence that the tests give different mean impurity levels at = 0.01. b) 1) The parameter of interest is the mean difference in impurity level, d where d i = Test 1 Test 2. 2) H 0 : 0 1 . 0 d 3) H 1 : 0 10 . 0 d 4) = 0.05 5) The test statistic is n s d t d / 1 . 0 0 6) Reject the null hypothesis if t 0 < - 7 , 05 . 0 t where 7 , 05 . 0 t = 1.895 7) d 0.2125 s d 0.1727 n 8 8424 . 1 8 / 1727 . 0 1 . 0 2125 . 0 0 t 8) Because -1.895<-1.8424 we fail to reject the null at the 0.05 level of significance. c) β=1 -0.9=0.1 579 . 0 1727 . 0 1 . 0 d N=8 is not an adequate sample size From the chart VII (g) n≈30 10-55 a) 1) The parameters of interest are the time to assemble standard deviations, 1 2 , 2) H 0 : 1 2 2 2 3) H 1 : 1 2 2 2 4) = 0.02 5) The test statistic is
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
2 2 2 1 0 s s f 6) Reject the null hypothesis if f 0 < 1 , 1 1 , 2 / 1 2 n n
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