Math 217 – Assignment 3
Due Wednesday,
February 4 at the beginning of class
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.
Reminders:
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 reference earlier in the book). Also, only include the output that you
reference in your discussion (there’s no need to include extra output that
isn’t relevant or discussed—this often actually makes the summary more
confusing).
Textbook Problems
12.31
12.32
[To create separate normal-quantile plots, use the Graph>Probability Plot>Multiple. By default, the distribution being compared to is
the normal]
12.33
[Uses same data file as 12.32. Use Tukey’s method of multiple
comparisons.]
13.31
[Recall the order of analysis steps for two-way ANOVA: 1) check the conditions
(normality and constant-variance) via plots of the residuals; if the conditions
appear to met then, 2) check if the interaction effect is significant; if the
effect is significant, then interpret the results using the interaction plot
(and also an interpretation of main effects, if appropriate); if the
interaction effect is not significant or if the interaction is significant, yet
the main effects tell an interesting story, then 3) check if the main effects
are significant; if either or both main effect is significant then, 4) use
Tukey’s method to see specifically where the significant differences are.]
13.34
[Uses same data file as 13.31. To separate a worksheet by
species use the Data>