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Paired Samples T-test Independent Samples T-test Multiple Regression One Way Analysis of Variance



1. Test significance level, a
Alpha is the probability of rejecting the null hypothesis of a zero multiple correlation coefficient when it is true (the probability of a Type I error).

Suggestion: Enter 0.05, a frequent standard

Acceptable entries: 0.001 to 0.20

**For this example: Stanovich et al set a = .05. So type ".05" in the first box.

2. Number of variables, k
Specify the number of variables to be included in the multiple regression model.

Acceptable entries: ³ 1

**For this example: There were 4 independent variables. So type "4" in the second box.

3. Squared multiple correlation, R2
Enter the proportion of total variance that is explained by the included covariates.

Acceptable entries: > 0.00 to 0.99

**For this example: Multiple R2 = .494. So type ".494" in the third box.