A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than the 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 300. On the basis of these data, can the researcher conclude that the preparation course has a significant difference on the SAT scores? Set alpha to 0.05

Calculate the 99% confidence interval.

Q89: What is the new critical value you will use for this calculation?

Q90: As you know, two values will be required to complete the following equation:

____________ < u ,< ____________