College athletes are known to have an average vertical jump of 18 inches with a standard deviation of 2.5 inches. After going through an intensive six-week jump training course a random sample of 50 athletes have an average vertical jump of 18.5 inches. Does this provide conclusive evidence that the jump training course is effective at raising a college athlete’s vertical jump? A. No, the test value is smaller than the critical value
B. No, the test value is larger than the critical value
C. Yes, the test value is smaller than the critical value
D. Yes, the test value is larger than the critical value