For this problem, we want the data for the 2 schools to be in the same data set. This can be done by cutting and pasting, or by creating another subset from the big dataset. We want to do a 2 sample t-test and get a .95CI for the difference in sample means. Again, separate data sets are useful for this problem. For each school, we want a simple plot of mathach against SES, a sample correlation coefficient, and value for beta, the regression coefficient.
X X denotes an observation whose X value gives it large influence.
Character graphs are obsolete.