Collaboration:

Collaboration on homework is allowed and can be helpful (and fun). Collaboration on homework is encouraged, both for using the computer and for doing problems. However, you must do all written work by yourself, both computer programs and answers to homework questions. You must also write, enter, and run all programs yourself.

If you collaborate with someone on a homework, list his or her name in a note at the top of the first part of your homework.

WARNING:

Make a copy of each homework before you hand it in !!

It may not be returned before you need to refer to it for the next homework (or for the next test).

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 the problems in the homework.

· (ii) Second, all SAS programs that you used to obtain the output for any of the problems. If possible, similar problems should be done with the same SAS program. (In other words, write one SAS program for several problems if that makes things easier. Better yet would be one SAS program for the entire homework with appropriate title statements to separate the problems in your output.)

· (iii) Third, all output for all the SAS programs in the previous step.

If the answer to a problem requires a table or a plot that you need to refer to in your answers, 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.

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 as well as in the SAS program. SAS programs may be graded for understandability.

Homework 0, Sample solution, SAS output

Homework 1, Sample solution, SAS output

Homework 2, Sample solution

Homework 3, SAS program, SAS output

Homework 4, Sample Solution, SAS output

Homework 5, Sample Solution, SAS output