In the 1980s, Tennessee conducted an experiment in which kindergarten students were randomly assigned to "regular" and "small" classes and given standardized tests at the end of the year. (Regular classes contained approximately 24 students, and small classes contained approximately 15 students.) Suppose, in the population, the standardized tests have a mean scoreof 925 points and a standard deviation of 75 points. LetSmallClassdenote a binary variable equal to 1 if the student is as