PAIRED SAMPLES TTEST (continued)
This will bring you to a table containing 9 components.
For this example, we will use the means for the entire sample.
We will now go through each component, filling in the
appropriate number using the data in this study.
1. Test significance level, a
Alpha is the probability of rejecting the null hypothesis of no mean
difference when it is true (the probability of a Type I error).
Suggestion: Enter 0.05, a frequent standard
**For this example: Tiggemann & Lynch set
a = .05. So type ".05" in
the first box.
2. Onesided or twosided test
A twosided (twotailed) test will reject the null hypothesis if differences
are large and positive or large and negative. A onesided (onetailed)
test rejects the null hypothesis only for differences in a single direction
(positive or negative).
Suggestion: Enter 2, a frequent standard
Acceptable entries: 1 or 2
**For this example: Tiggemann & Lynch looked
at a twotailed test. So type "2" in the second box
