The ff data are given for two classes of QUAMET1. A sample of 13 from class A has a third quiz mean of 45.3 and a standard deviationof 14.7. A sample of 11 from class B has a third quiz mean of 39.4 and a standard deviation of 17.4. The population variances are known to be equal.

It is desired to know whether the overall performance of class A is better than class B by at least 4 points. Assume a 95% confidence level and normal distribution of third quiz population scores.Round your answers to 2 decimal places. For values less than '1' make sure you put a '0' before the decimal place.

1. The critical value for the critical region of the hypothesis test is?

2. The value of your test statistic would be?

3. Which of the following would be your conclusion? Choose the letter (capital letter).

A. Class A and Class B performance are strictly the same

B. Class A performance is better than Class B by at least 4 points

C. Class A performance is worse than Class B by at least 4 points

D. Class A performance is better than Class B by at most 4 points