Question

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 (? = 1050). The 16 students who attend the preparation course average 1200on 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. Calculate the 95%confidence interval a. what is the mean for this calculation b what is the new critical value you will use c.two values to complete the equation d. which of the following is a more accurate interpretation of the confidence interval A 95%confident scores fall in the interval _____ to_____ B 95% confident that average score on SAT by students falls in to the interval ____to____ C. 95% confident that the example above has correct values D. 95% confident that the difference in SAT scores between the students who took and didn't take the prep course did not fall in the interval ___to___

Answer 1

option B is correct:

5% confident that average score on SAT by students falls in to the interval =1146.73 to 1253.28