M 358K Assignment for Wednesday, February 8:
I. No new reading -- this will be a catch-up day, so be sure to bring
any questions you have about reading and exercises that have not been
discussed. Some specific items might be posted here after class Monday, so be sure to check back. Added after class Friday: We will continue with the handout Least Squares Regression Line. Be prepared to discuss Exercises 2.42(c), 2.59, and 2.60 from Section 2.3, and Exercises 2.38 and 2.40 from Section 2.2.
II. Hand in: Problems 2.104, 2.106, 2.108, 2.110, 2.112 (You might find 2.112 easier if you ignore the hint.)
Comment on 2.104 added 2/5/06:
This should help make the second question in part (a) make more sense:
People often use "variance" and "standard deviation" interchangeably to
describe "volatility," since you can get one from the other.
Comments on 2.106 added 2/5/06:
i. Plot stride rate vs speed (That is, treat stride rate as the response, speed as the explanatory variable.)
ii. You may need to look at the data set carefully and compare with the
data as given in the textboook to see what each column in the data set
is. You then may need to do some thinking about how to get the software
to do what is requested. (One possible thing you might investigate is
whether your software has a "stack" command or something similar.)
Comments on 2.108 added 2/5/06:
I wasn't able to find the file for these data in the textbook data
files. If you also have this problem, see if you can copy the data from
this text file.
If not, you'll need to enter the data by hand. On Minitab, you can use
the Make Patterned Data command to do the Length column easily. Note
that this is marked as a Challenge exercise -- part of the
challenge is in figuring out how to make your software do the plot
asked for in (d)
Comment on 2.110 added 2/5/06: The article referred to in this problem is the one discussed in the preceding problem, 2.109.
III. The assignment for Friday is fairly long, so you may want to get a head start on it.