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Name:

Please answer the following questions on this form (or on a paper copy of this form).

1. Define the t-test. Give a precise, general formula both for t and for df and say what it is good for. Give a specific relevant example from bioinformatics.

   [Answer here:]

2. Briefly explain in words, not formulae, what ANOVA is, what the Sum of Squares (Between) is, what the Sum of Squares (Within) is, and what the F-ratio is.

   [Answer here:]

3. Briefly explain what problem is addressed by multivariate ANOVA, how it is similar to ANOVA and how it is different.

   [Answer here:]

4. At the end of section 2, the authors discuss blood pressure as a "ratio variable". Your blood pressure consists of two numbers -- a higher number, your systolic pressure, and a lower number, your diastolic pressure. Explain what a ratio variable means, and discuss first, whether blood pressure is or is not a ratio variable, and then, considering what the authors have said whether it is statistically appropriate to treat blood pressure as a "ratio variable".

   [Answer here:]

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