Please help me solve questions 78-85, thanks so much!

The following 14 questions (078 to Q91) are based on the following example: A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than students who do not attend the preparation course. For those who do not attend the course, the population mean is 1050 (H = 1050). The 16 students who attend the preparation course average 1 150 on the SAT, with a sample standard deviation of 300. On the basis of these data, can the researcher conclude that the preparation course has a significant difference on SAT scores? Set alpha equal to .05. Q78: The appropriate statistical procedure for this example would be a A. z-test B. t-test Q79: Is this a one-tailed or a two-tailed test? A. one-tailed B. two-tailed Q80: The most appropriate null hypothesis (in words) would be A. There is no statistical difference in SAT scores when comparing students who took the SAT prep course with the general population of students who did not take the SAT prep course. B. There is a statistical difference in SAT scores when comparing students who took the SAT prep course with the general population of students who did not take the SAT prep course. C. The students who took the SAT prep course did not score significantly higher on the SAT when compared to the general population of students who did not take the SAT prep course. D. The students who took the SAT prep course did score significantly higher on the SAT when compared to the general population of students who did not take the SAT prep course. Q81: The most appropriate null hypothesis (in symbols) would be A. HSATprep = 1050 B. HSATprep = 1150 C. USATprep