STAT 462 - HW 4 Solution Key

STAT 462 - HW 4 Solution Key - Stat 462, Spring 2008...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Stat 462, Spring 2008 Homework 4 Solution key Due February 29, 2008 Prepared by: Esra Kurum 2.17 (5 points) The α level used by the analyst was greater than 0.033. If α level had been 0.01, the appropriate conclusion would have been to accept the Ho. 2.18 (5 points) The t-test may be calculated as a one-sided or a two-sided test, but the F-test is only two-sided. 2.22(20 points) It is possible that for a complete set of 30 cases the R 2 won’t be zero; since if the 20 cases that we didn’t consider while first estimating R 2 falls on the regression line they will decrease SSE and increase the value of R 2 . It is possible that for a complete set of 30 cases the R 2 being zero; but not being zero for the first 10 cases. For instance for Y=X 2 , R 2 can be zero for the 30 cases but for the first part of the curve R 2 is not equal to zero.-15-10-5 5 10 15 50 100 150 200 x x^2 for the first 10 cases Rsquare is not zero 2.23(25 points- a 4 points; b, c, d 5 points each; e and f 3 points each) a) Analysis of Variance Table Source DF SS MS F P Regression 1 3.5878 3.5878 9.24 0.003 Residual Error 118 45.8176 0.3883 Stat 462, Spring 2008...
View Full Document

This note was uploaded on 03/17/2008 for the course STAT 462 taught by Professor Senturk,damla during the Spring '08 term at Penn State.

Page1 / 6

STAT 462 - HW 4 Solution Key - Stat 462, Spring 2008...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online