Use the Following to Answer the Questions Below

Multiple Choice

Use the following to answer the questions below:
A small university is trying to monitor its electricity usage. For a random sample of 30 weekend days (Saturdays and Sundays) , the student center used an average of 94.26 kilowatt hours (kWh) with standard deviation 43.29. For a random sample of 60 weekdays, (Monday - Friday) , the student center used an average of 112.63 kWh with standard deviation 32.07.
-Construct a 95% confidence interval for the difference in mean electricity use at the student center between weekdays and weekend days. Use two decimal places in your margin of error.

A) 0.12 to 36.62 kWh
B) -6.80 to 43.54 kWh
C) -4.61 to 41.35 kWh
D) -3.38 to 40.51 kWh