Exam 3

# Exam 3 - 1 Experimental Unit Current College Students...

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

1. Experimental Unit: Current College Students Dependent Variable: GPA (point average) Independent Quantitative Variables: Age(years) Independent Qualitative: 1 if female and 0 if male 2. No extreme multicolinearity since correlation between Age(x1) and gender (x2) is less than .3. PO3 3. Y-outliers: None, no cases that contain a standard residual greater than 3 in absolute value Y-suspect outliers: 4, 36; strd. Residuals between 2 and 3 in absolute value. X-outliers: no; no age value far away from all other x1 values 4. Test for Curvature a)Complete: E(y)= B 0 + B 1 x 1 +B 2 x 1 2 + B 3 x 2 +B 4 x 1 x 2 + B 5 x 1 2 x 2 b) Reduced: E(y)= B 0 + B 1 x 1 + B 2 x 2 + B 3 x 1 x 2 Test for curvature: Ho: B 4 =B 5 =0 Ha: At least 1 B different c) P-value: .42 d) Alpha: .05 e)Fail to reject Ho: Insufficient evidence of curvature in a relationship between GPA(y) and age(x1) PO 5 5. Test for Interaction a) Complete Model: E(y)= B 0 + B 1 x 1 + B 3 x 2 + B 4 x 1 x 2 b) Reduced Model: B 0 + B 1 x

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.

## This note was uploaded on 11/16/2011 for the course QMB 3200 taught by Professor Smith during the Fall '08 term at FSU.

### Page1 / 2

Exam 3 - 1 Experimental Unit Current College Students...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online