practice_final

practice_final - In an experiment, with n=13 observations,...

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

View Full Document Right Arrow Icon
In an experiment, with n=13 observations, the estimated regression line is y=0.365+ 0.967x. I am giving you the following MSE=0.0373 and MSR=1.0427. a) Calculate SSE. b) Calculate the estimated variance of the regression c) Calculate the Coefficient of determination d) Calculate the correlation between x and y. To solve this exercise you need to know how the ANOVA Table of regression looks like: a) MSE=SSE / n-2 which means SSE=MSE*(n-2)=0.4103 b) Estimated variance for regression is equal to MSE=0.0373 c) Coefficient of determination = 1- SSE/SSTo SSTo = SSR + SSE = 1.0427+ 0.4103= 1.453 (Remember in ANOVA Table SSR= MSR) So 2 0.4103 1 1 0.7176 1.453 SSE r SSTo =− = d) 2 0.8471 rr == In an experiment, with n=11 observations, the estimated regression line is y=1.65+ 0.9555x. I am giving you that 1 0.1971 b s = . Find a 95% confidence interval for the slope. () 0.9555 2.262*0.1971 0.9555 0.4458 .5097,1.4013 ± ±
Background image of page 1

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

View Full DocumentRight Arrow Icon
In a sample of 100 Professors in a university we have 70 males and 30 females. Out of 70 males 20 are Professors 25 are Associate Professors and the rest are Assistant Professors.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/23/2009 for the course STAT 319 taught by Professor Smith during the Fall '08 term at Penn State.

Page1 / 2

practice_final - In an experiment, with n=13 observations,...

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