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 (u= 1050). The 16 students who attend the preparation course average 1150 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. Q18: The appropriate statistical procedure for this example would be a A. z-test B. t-test Q19: Is this a one-tailed or a two-tailed test? A. one-tailed B. two-tailed