a researcher is interested in whether students who attend privte high schools have higher average SAT Scores than students in the general population. a random sample of 90 students at a private high school is tested and a mean SAT score of 1030 is obtained. The average score for public high school student is 1000 (o = 200) Is this a one - or two tailed test? What are Ho and Ha for this study? Compute Zobt