The time needed for college students to complete a certain paper and pencil maze follows a Normal distribution, with a mean of 70 seconds and a standard deviation of 15 seconds. You wish to see if the mean time μ is changed by meditation, so you have a group of 9 college students meditate for 30 minutes and then complete the maze. You to complete the maze and will use this information to test the hypothesescompute the average of their times
H0: [mu]= 70, Ha: [mu] NOT equal to 70 at significance level a = 0.05. If you observe a sample mean completion time of = 78.55, the test statistics and decision is:
Z(test)=1.96, Fail to reject the Ho
Z(test)=1.71, Reject the Ho
Z(test)=1.96, Reject the Ho
Z(test)= 1.71, Fail to reject the Ho