The following three statements relate to hypothesis testing. Select the correct answer for each of the following statements.

1) coefficients allow us to infer that one variable causes the other True or False

2) Significant regression coefficients allow us to infer that one variable causes the other True or False

3) You can use a t-test to determine whether the slope of a line of best fit is statistically different from a line with slope = 0 True or False

4) The value of a pearson's correlation coefficient (r) squared represents the proportion of variance of one variable that is explained by the other variable True or False

5) The relationships revealed by both correlation and regression analyses can sometimes be explained by a "third variable" True or False