exam1_2009

# exam1_2009 - STA 6167 Exam 1 Spring 2009 PRINT Name Use...

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

STA 6167 – Exam 1 – Spring 2009 PRINT Name ______________________________________ Use α =0.05 for all problems A regression model is fit, relating a response (Y) to 3 predictors (X 1 , X 2 , X 3 ) based on n=40 individuals. Two models are fit: Model1: E(Y) = β 0 + β 1 X 1 + β 2 X 2 + β 3 X 3 SSE 1 = 2000 Model2: E(Y)= β 0 + β 1 X 1 + β 2 X 2 + β 3 X 3 + β 11 X 1 2 + β 22 X 2 2 + β 33 X 3 2 + β 12 X 1 X 2 + β 13 X 1 X 3 + β 2 3 X 2 X 3 SSE 2 =1400 Test whether all quadratic terms and interaction terms do not contribute above and beyond the effects of X 1 , X 2 , and X 3 . H 0 : _________________________________________ Test Statistic: Reject H 0 if the test statistic falls above / below ______________________________________ For a 1-Way ANOVA, based on 3 treatments, and 30 subjects per treatment, give the Treatment and Error Degrees of Freedom: Df Trt = ______________________ df Err = ______________________________ An experiment is conducted to compare the effects of 4 types of fertilizer on the growth of a particular plant. A sample of 8 locations (blocks) in a large yard are selected and 4 plants are planted at each location. At each

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

View Full Document
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