A group of 8 students were given the same standardized test twice to see whether retaking the test affected the score. 50 80 The table gives the score improvements for the 8 students. Complete parts a through e. - 10 80 - 30 10 - 50 50 d. Are the numbers in the table paired differences? Choose the correct answer below. Yes O No e. At the 5% significance level, do the data provide sufficient evidence to conclude that the mean scores from the first and second tests (retake) differ? (Note: d = 22.5 and So = 49.79.) Preliminary data analyses indicate that use of a paired t-test is reasonable. What are the hypotheses for the t-test? O A. Ho: My = H2 OB. Ho: H1 2 H2 Ha: M1 > H2 Ha: M1