{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

MeansCompare - Experiments with a Single Factor...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Experiments with a Single Factor Means Comparisons MeansCompare.ppt D.A. Schaub, Univ. of Florida
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
Comparing Treatment Means: Tukey’s Test Suppose we wish to compare the  results of our treatments This will show us if there is a statistically  significant difference in the tensile  strength as affected by %Cotton Our hypothesis is j i j i H H μ μ μ μ = : : 1 0
Image of page 2
Tukey’s Test n MS y y q E min max - = Tukey’s test uses the distribution of the studentized range For equal sample sizes, 2 means are different if the absolute value of their sample differences exceeds ( 29 n MS f a q T E , α α = See text pp. 97-98
Image of page 3

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

View Full Document Right Arrow Icon
Tukey’s Test (cont.) Assuming that α =0.05, and knowing that a=5 and df E =20 23 . 4 ) 20 , 5 ( 05 . 0 = q From App. Table VIII 37 . 5 5 06 . 8 23 . 4 ) 20 , 5 ( 05 . 0 05 . 0 = = = n MS q T E
Image of page 4
Using Tukey’s Test To use this test (and the ones  following), we need to compare the  average  tensile strength for each setting  of cotton 8 . 10 6 . 21 6 . 17 4 . 15 8 . 9 . 5 . 4 . 3 . 2 . 1 = = = = = y y y y y
Image of page 5

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

View Full Document Right Arrow Icon
Image of page 6
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