students who did not take the course. The CD file named SAT contains the scores for this study. a. Formulate the hypotheses that can be used to test the researcher’s belief that the improvement in SAT...

students who did not take the course. The CD file named SAT contains the scores for this study. a. Formulate the hypotheses that can be used to test the researcher’s belief that the improvement in SAT scores may be less than the stated average of 120 points.

b. Usingα= .05, what is your conclusion?

c. What is the point estimate of the improvement in the average SAT scores provided by the test preparation course? Provide a 95% confidence interval estimate of the improvement.

d. What advice would you have for the researcher after seeing the confidence interval?