This project can be done in groups. Each group must find a set of data, preferably but
Question:
This project can be done in groups. Each group must find a set of data, preferably but not restricted to your field of study. The data need to fit the regression framework with a regression variable x and a response variable y. Carefully make the assignment as to which variable is x and which y. It may be necessary to consult a journal or periodical from your field if you do not have other research data available.
(a) Plot y versus x. Comment on the relationship as seen from the plot.
(b) Fit an appropriate regression model from the data. Use simple linear regression or fit a polynomial model to the data. Comment on measures of quality.
(c) Plot residuals as illustrated in the text. Check possible violation of assumptions. Show graphically a plot of confidence intervals on a mean response plotted against x. Comment.
Essentials of Probability and Statistics for Engineers and Scientists
ISBN: 978-0321783738
1st edition
Authors: Ronald E. Walpole, Raymond Myers, Sharon L. Myers, Keying E. Ye