A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT then students who do not attend the preparation course. For those who do not attend the course, the population mean is 1050. The 16 students who attend the preparation course average 1150 on the SAT, with a sample standard deviation of 100. 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 .01.

As a researcher, would you be more concerned with Type I or Type II statistical error if you reject the null hypothesis and there is a statistical difference?

Calculate 95% confidence interval.

The mean you will use for this calculation is 1050 or 1150?

What is the new critical value you will use for this calculation?

two values will be used to complete ______ less than or greater than mean less than or greater than _______

Which of the following is a more accurate interpretation of the confidence interval you just computed?