Choose the correct statement. Only one statement is true.

1. The calculated t-statistic from a two-sample t-test is 1.82. Each group included 10 observations. We can reject the null hypothesis at a 5% alpha level (2-sided).
2. A simple ANOVA is appropriate when comparing measures collected from the same subjects at three different time points.
3. The r value from a regression is the measure of the shared variance between two variables, X and Y.
4. The calculated F-statistic from an ANOVA is 3.32. The between groups degrees of freedom are 5 and the degrees of freedom of the error are 50. We can reject the null at a 5% alpha level.