Laboratory Exercise 7: Hypotheses

Think of two different studies in which you will compare 2 groups on some variable (e.g., the book uses the example of the IQ of a particular group vs. the IQ of the general populationdo not use this example). Answer questions 1-6 for each study then answer questions 7 and 8.

Study 1
What are your two groups?
What is the variable you will test?
3. State your null hypothesis using the notation shown in the book.
4. State your alternative hypothesis using the notation shown in the book.
Verbally describe your hypothesis.
6. Is your alternative hypothesis one-tailed (directional) or two-tailed (non-directional)?

Study 2
What are your two groups?
What is the variable you will test?
3. State your null hypothesis using the notation shown in the book.
4. State your alternative hypothesis using the notation shown in the book.
Verbally describe your hypothesis.
6. Is your alternative hypothesis one-tailed (directional) or two-tailed (non-directional)?

(Don't over think these questions) 7. If you set your alpha level at .05, what statistical p-value would allow you to reject your null hypothesis?

8. If you set your alpha level at .05, what is the probability of making a Type I error?