A hybrid course is one that contains both online and classroom instruction. In a study performed at Middle Georgia State College, a software package was used as the main source of instruction in a hybrid college algebra course. The software tracked the number of hours it took for each student to meet the objectives of the course. In a sample of students, the mean number of hours was , with a standard deviation of 51.2. a. Construct a 95% confidence interval for the mean number of hours it takes for a student to meet the course objectives.
b. If a sample of 90 students had been studied, would you expect the confidence interval to be wider or narrower than the interval constructed in part (a)? Explain.