Question

Show all work and answer steps in complete sentences pls list them ex. Step 1 underline steps

A psychologist wants to compare the group of people who exercise regularly and the group of people who do not exercise regularly on the level of stress. She took a sample of 8 people from each population. These numbers indicate the participants’ stress levels. Can she conclude that there is a difference between two groups on the level of stress? Conduct four steps of hypothesis testing. Use a two-tailed test with α = .05.

Not exercise            Regular Exercise

3                   4
7                   4
8                     3
5                     2
4                   5
7                                         1
6                   1
8                     4

SS = 24                      SS = 16

Step 1: State your null and research hypotheses.
Step 2: What is the df for two groups combined?
Step 3: What are the cut-off points?
Step 4: Find the pooled variance.
Step 5: Find the estimated standard error.      

Answer 1

Cut of points are -2. 145 and +2.145

Pooled variance = 2.8571

Std error = 0.8452

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