It may not be returned before you need to refer to it for the next
homework (or for the midterm or final).
SAS PROGRAMS AND ASSIGNMENTS:
If you use SAS to do a homework problem, then the SAS program and
output must be included as part of the assignment.
ALWAYS INCLUDE YOUR NAME in a title statement in your SAS
programs, so that your name will appear at the top of each output page.
All homeworks MUST BE ORGANIZED in the following order:
(i) First, your answers to all problems.
(ii) Second, all SAS programs that you used to obtain the
output. Similar problems should be done with the same SAS program. (In
other words, write one SAS program for several problems if that makes
(iii) Third, the output of all the SAS programs in the previous
If the answer to a problem requires a table or a plot, add page
numbers to your homework and make references in part (i) by page
number, such as ``The scatterplot for part (b) is on page #X
in the SAS output below.'' Alternatively, you could Xerox a page or two
of your SAS output and include it in part (i) along with
annotations as well as in part (iii), but references by page number
will usually be enough.
MAKE SURE that part (iii) of your homework (SAS output) has consecutive
page numbers, so that it is easy to find ``page #X'' in your output.
If you use several different SAS programs for your output (which is often
easier), then write your own page numbers on the output if necessary and
refer to those page numbers in part (i) of your homework.
If a problem asks you to do a statistical test, EXPLAIN CLEARLY what
the null hypothesis H_0 is, what test you used, what the P-value is, and
whether the data is significant, highly significant, or neither. Include
this as part of your answer in part (i).
SAS programs should be structured, or have enough comments, so that
someone who looks at the program a year from now can easily tell what the
program is doing. It is even better if descriptive comments can be put in
title (or title2 or title3) statements, since
these will appear in the SAS output. SAS programs may be graded for
SAS Online Printed Manuals:
These have more detailed descriptions about what SAS procedures do,
the options that are available, and the underlying statistical theory than
the online help files in PC Windows SAS.
See SAS Online Manuals for
Recommended References: Survival analysis: a practical approach.
Mahesh K. B. Parmar and David Machin (1996), John Wiley and Sons.
Using the SAS Windowing Environment: A Quick Tutorial,
L. Hatcher, SAS Institute Press, 2001.
Survival analysis using the SAS system: a practical guide.
Paul D. Allison (1995). SAS Institute Press.
Applied survival analysis: regression modeling of time to event
data. David Hosmer and Stanley Lemeshow (1999), John Wiley & Sons.
Survival analysis: a self-learning text. David G.
Kleinbaum (1996), Springer, New York.
The statistical analysis of failure time data. J. D.
Kalbfleisch and R. L. Prentice (1980), John Wiley & Sons.
Statistical models and methods for lifetime data. J.
F. Lawless (1982), John Wiley & Sons, New York.
Click here for Prof. Sawyer's home page:
Top of this page
Mathematics Department Home Page
Washington University Home Page
University City Home Page
Last modifiedDecember 13, 2005