Please help with the following:

Question 19 [1 point] If the alpha level is changed from at =.05 to at = .01, what happens to the critical value in a right-sided test? 0 It stays the same 0 It decreases 0 It increases Question 20 [1 point] A middle school in Montreal decides to test whether an after-school program focused on stress management and self-care hasan impact on students' grades on a comprehensive final exam. To evaluate the effectiveness of this programI a random sample of n=49 students are required to attend the after-school program. At the end of the year, all students take the same comprehensive final exam. The average score of the sample is M=?5. For the general population of students, the final exam scores form a normal distribution with a mean of u = ?2 and a standard deviation of or = 3. What can you conclude after conducting a two-tailed hvpothesis test (a=.05}. 0 Failure to reject the null hvpothesis, the after-school program has a significant effect on students' grades. 0 Failure to reject the null hypothesis, the after-school program does not have a significant effect on students' grades. 0 Rejection of the null hypothesis, the after-school program has a signicant effect on students' grades. 0 Rejection of the null hvpothesis, the after-school program does not have a significant effect on students' grades. In the following graph, the yellow/orange part of the graph represents the ___