{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Homework5

# Homework5 - STA 3024 Homework 5(due Friday July 30 Total 30...

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

STA 3024: Homework 5 (due Friday July 30) Total: 30 points Since its implementation in 2005, the essay portion of the SAT writing test has been severely criticized by those who claim that students’ scores are based almost exclusively on factors such as the length of the essay and the use of long words, without regard to reasoning, organization, or precise use of language. Suppose we want to investigate this claim. We record the number of words ( X 1 ), proportion of words that are eight or more letters ( X 2 ), and score ( Y ) for a random sample of 31 essays from diﬀerent students. (The essays are graded in whole numbers on a scale of 1–12.) The multiple regression equation, standard errors of the regression coeﬃcients, and multiple regression ANOVA table are shown below. ˆ Y ( X 1 ,X 2 ) = 1 . 82 + 0 . 0162 X 1 + 6 . 19 X 2 (SE of a ) = 1 . 32 (SE of b 1 ) = 0 . 00259 (SE of b 2 ) = 10 . 47 Source df SS MS Regression 2 59.217 29.609 Residual 28 42.267 1.510 Total 30 101.484 1. (a) Calculate the value of

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 ]}

### Page1 / 2

Homework5 - STA 3024 Homework 5(due Friday July 30 Total 30...

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

View Full Document
Ask a homework question - tutors are online