practiceexam2fall2010

# practiceexam2fall2010 - ISYE6413 Fall 2010 Exam II Dr Kobi...

This preview shows pages 1–4. Sign up to view the full content.

ISYE6413 Fall 2010 Exam II Dr. Kobi Abayomi October 20, 2010 You must show all work to receive full credit. 1

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

View Full Document
1 Consider an ANCOVA model with two treatments on response Y with covariate X . You get these outputs: Call: lm(formula = y ~ x + factor(t), data = dt) Residuals: 1 2 3 4 5 6 0.5833 0.3333 -0.9167 -1.0833 0.6667 0.4167 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -2.3333 2.1104 -1.106 0.3496 x 2.2500 0.5069 4.439 0.0213 * factor(t)2 6.6667 0.8278 8.054 0.0040 ** --- Signif. codes: 0 *** 0.001 ** 0.01 * 0.05 . 0.1 1 Residual standard error: 1.014 on 3 degrees of freedom Multiple R-squared: 0.9657,Adjusted R-squared: 0.9429 F-statistic: 42.28 on 2 and 3 DF, p-value: 0.006341 and Call: lm(formula = y ~ as.factor(t), data = dt) Residuals: 1 2 3 4 5 6 -1.6667 0.3333 1.3333 -3.3333 0.6667 2.6667 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 6.667 1.394 4.781 0.00877 ** as.factor(t)2 6.667 1.972 3.381 0.02777 * --- Signif. codes: 0 *** 0.001 ** 0.01 * 0.05 . 0.1 1 2
Residual standard error: 2.415 on 4 degrees of freedom

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.

### Page1 / 12

practiceexam2fall2010 - ISYE6413 Fall 2010 Exam II Dr Kobi...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online