Discussion:
Q1: The average electric bill for residents of Anderson creek is at least 52.98 per month. Develop the appropriate null and alternative hypothesis. What is the type I error in this situation? What is the type II error in this situation?
Q2: Full time PhD students receive an average salary of 12, 837 according to the US Department of Education. The dean of a graduate studies department at a large university feels that PhD students in his state earn more than this. He surveys 44 randomly selected students and finds their average salary is 14,445 with a standard deviation of 1,500. With ?=.05, is the dean correct?