Lab 4 - Azfar Khandoker Dr Knapp Stat 350 4:30 Lab#4 1 a...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Azfar Khandoker Dr. Knapp Stat 350 4:30 Lab #4 1. a. The TTEST Procedure Statistics Lower CL Upper CL Lower CL Upper CL Variable type N Mean Mean Mean Std Dev Std Dev Std Dev Std Err val cat 10 55.512 66.02 76.528 10.104 14.689 26.817 4.6452 val dog 12 40.261 48.408 56.556 9.0842 12.824 21.773 3.7019 val Diff (1-2) 5.3802 17.612 29.843 10.477 13.695 19.776 5.8637 T-Tests Variable Method Variances DF t Value Pr > |t| val Pooled Equal 20 3.00 0.0070 val Satterthwaite Unequal 18.1 2.97 0.0083 Equality of Variances Variable Method Num DF Den DF F Value Pr > F val Folded F 9 11 1.31 0.6603 b. Alternate Hypothesis do not assume equal variance assume equal variance µ d - µ c ≠ 0 0.0083 0.007 µ d - µ c < 0 0.0083 / 2 = 0.00415 0.007 / 2 = 0.0035 µ d - µ c > 0 0.0083 / 2 = 0.00415 0.007 / 2 = 0.0035
Image of page 1

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

View Full Document Right Arrow Icon
c. Yes, the assumption of equal variance is appropriate. This is because the p-value relating to the “Equality of Variances” is 0.6603 which is greater than α = 0.05. With this p-value , we come to the conclusion that the assumption of equal variance is correct. 2. a. H o : µ o - µ y = 0 H a : µ o - µ y > 0 b. The TTEST Procedure Statistics Lower CL Upper CL Lower CL Upper CL Variable age N Mean Mean Mean Std Dev Std Dev Std Dev Std Err score old 8 118.63 122.5 126.37 3.0606 4.6291 9.4215 1.6366 score young 16 102.42 115.13 127.83 17.607 23.835 36.89 5.9588 score Diff (1-2) -10.45 7.375 25.204 15.355 19.854 28.1 8.5969 T-Tests
Image of page 2
Image of page 3
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