I want to see if there is a real difference in the ability of my two different statistics classes ;). The first class has 12 students, scored got an average score in the first half of the course of 76% with a sample standard deviation of 12%, the second class has 19 students, scored got an average score in the first half of the course of 73% with a sample standard deviation of 15%. Test the claim that the students the ability of the students is different at the 5% significance level. 5