Math 217 – Assignment 2

Due Friday, January 30 at the beginning of class

Reminder of homework guidelines:

Your write-up must be your own (you can talk with other students about the problems and potential solution methods, but you must write up the solutions individually, using your own words). Your grade will depend on both the content/correctness and exposition of your answers—be thorough and careful.

Use of Minitab:

The data files for the homework problems are included in the Math_217 share folder (on the U:/ Drive in the Class_Share/Math Folder). Make copies of these in your own account, and work with your own files (rather than the ones in the share folder). Minitab is on the campus network, so you can access it from any computer lab on campus.

Another Reminder:

To fully answer these questions, you must understand the data sets as thoroughly as possible (based on the information you have in the textbook). Be sure to familiarize yourself with each data set (including looking at a references earlier in the book).

Textbook Problems (all from Chapter 11)

11.7

11.16 [To create a new squared variable in Minitab, recall you can use the Calc>Calculator option.]

11.18 [Uses same data file as 11.16.]

11.24 [Minitab can determine correlations: Stat>Basic Statistics>Correlation.]

Additional part to problem 11.24: (e) Create an indicator variable for Gender (recall, you only need use one of the indicators—either for males or females—in the regression. Then run a regression with IQ, gender, and self-concept as the predictor variables. Assess the model in terms of fit (r-squared), significance of regression coefficients, residuals (are the model conditions met?), and give a worded explanation of the numerical value on the coefficient for gender.

11.26 [You might want to make use of Graph>Matrix Plot.]

11.27 [Uses same data file as 11.26.]

11.28 [Uses same data file as 11.26.]