# Biological Data Analysis: Homework 5

## Due Tuesday, Oct. 1

**You must type this and all other homework assignments. Do not e-mail the assignment to me; turn it in early (at 322 Wolf) for a foreseeable absence, or turn it in late after an unexpected absence from class. **

**1. **Look at the data you collected for homework 4 and pick out the two groups whose means are closest to each other. Do a t-test on the two groups you picked, using the Excel function described on the t-test page. Report the P-value and say what it means.

**2. **Do a t-test on the two groups you picked in question 1, using SAS. Show your SAS program, your log file, and your output.

**3. **Study for the exam, then try to answer the study questions without looking at your notes. You don't need to turn in anything for this question.

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This page was last revised September 26, 2013. Its URL is
http://udel.edu/~mcdonald/stathw5.html