A statistics professor wishes to estimate the average mark on a term test for a course that has multiple sections and many students. A survey of some of the students registered for the course reveals the following results: Descriptive statistics Class Grades count 32 mean 70.81 sample variance 520.15 sample standard deviation 22.81 minimum 14.3 maximum 99.2 range 84.9 standard error of the mean 4.03 Determine a 95% confidence interval for the term test results