Answer Happy

Question Grey Sloan Memorial Hospital's surgeons have a new procedure that they think will decrease the time to perform an appendectomy. A sample of 17 appendectomies using the old method had a mean of 36 minutes with a standard deviation of 8 minutes, while a sample of 16 appendectomies using the experimental method had a mean of 37 minutes with a standard deviation of 12 minutes. For a right-tailed test of the means; assuming unequal variances at a = 0.01, the test statistic is: 0.6091 0.2799 -0.2799 0.3909 0.7819 0 2.4851 -2.4851 -0.2833 Impossible to calculate without the raw data.