A professor conducts a study with 12 students to determine the extent to which the number of voluntary online quizzes completed was related to final course grades. If the correlation coefficient is r = +.584, then what is the decision for a two-tailed test at a .05 level of significance? (Hint: You will need to calculate the critical value for this problem, see page 307-308 of your textbook for help). A professor conducts a study with 12 students to determine the extent to which the number of voluntary online quizzes completed was related to final course grades. If the correlation coefficient is r = +.584, then what is the decision for a two-tailed test at a .05 level of significance? (Hint: You will need to calculate the critical value for this problem, see page 307-308 of your textbook for help). Reject the null hypothesis. Fail to reject the null hypothesis