1. Use the following 7 observations on ACT scores and Draw a scatter plot for ACT (on...
Question:
1. Use the following 7 observations on ACT scores and Draw a scatter plot for ACT (on x-axis) and GPA (on y-axis) and a OLS regression line (i.e. fitted values) on the same figure.GPA:
GPA 2.8 3.4 3.0 3.5 3.6 3.0 2.7
ACT 21 24 26 27 29 25 25 (1)
(2) Estimate the intercept and slope of a simple linear regression model, GP A = β0 + β1ACT + u, and report the R regression summary output.
(3) Interpret βˆ1. Comment on the direction of the relationship between GPA and ACT.
(4) Generate new variables for the predicted values and the residuals. Report the mean values of the predicted values and the residuals.
(5) If another observation has ACT=22, what is your best prediction for GPA? Can you calculate the residual for this prediction? Why or Why not?
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill