Quiz

How many more hours do night students work compared to day students?  The 20 night students who were surveyed worked an average of 32 hours per week with a standard deviation of 10 hours.  The 40 day students surveyed worked an average of 15 hours per week with a standard deviation of 12 hours.  Determine the appropriate 95% confidence interval and use a complete sentence to interpret it in the context of the study.