Results for this submission At least one of the answers above is NOT correct. (10 points) The time needed for college students to complete a certain paper-andpencil maze follows a normal distribution with a mean of 30 seconds and a standard deviation of 3.4 seconds. You wish to see if the mean time is changed by vigorous exercise, so you have a group of 15 college students exercise vigorously for 30 minutes and then complete the maze. It takes them an average of x=27.9 seconds to complete the maze. Use this information to test the hypotheses H0:=30Ha:=30 Conduct a test using a significance level of =0.01. (a) The test statistic (b) The positive critical value, z= (c) The final conclusion is A. There is not sufficient evidence to reject the null hypothesis that =30. B. We can reject the null hypothesis that =30 and accept that =30