You are interested to see if hostility levels are affected by the phases of the moon. You get a rating from a group of 9 subjects on a hostility scale during a new moon and again during a full moon.

Step 1: Write out your Research and Null Hypothesis.

Subject# NewMoon FullMoon

1 15 15

2 10 13

3 2 5

4 5 4

5 7 10

6 6 7

7 13 14

8 8 6

9 9 10

Step 2: What is your comparison Mean?

Step 2: What is your Sample Mean?

Step 2: What is your comparison Standard Error?

Round to the nearest hundredth (two decimal places)

Step 3: What is your critical value (cutoff score) for p<.05?

Step 3: What is your critical value (cutoff score) for p<.01?

Step 4: What is your sample t-score?

Round to the nearest hundredth (two decimal places)

Step 5: What do you conclude?