# Biological Data Analysis: Homework 6

## Due Tuesday, Nov. 7

**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. **For the last time, you're going to analyze the balance data set. Pick one of the measurement variables and do a linear regression/correlation between it and log-transformed balance time. Draw a nice graph showing the regression line and dots for the individual data points. DON'T use the graph that's included on my spreadsheet, draw your own Excel graph from scratch. Report the equation of the line, the r^{2}, and the P-value. Write a couple of sentences interpreting your results.

**2. **Now do polynomial regression on the same data set. Report the P-values and R^{2} for the quadratic and cubic equations, and also report the P-values for the *increase* in R^{2} at each step. Write a couple of sentences interpreting your results.

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Biological Data Analysis syllabus