Question: A dietitian wants to test if a new food menu on campus is lowering the weight of students. To investigate, she randomly samples 49 students and records their weights. The scores have a mean of 151 pounds. A recent campus census taken before the new food menu showed the mean weight for students of 157 pounds with a standard deviation of 9 pounds. Can the researcher conclude that students now weigh less? Show all 4 steps of our hypothesis testing procedure.