5* Test Information Description Week #5 PREP CHECK Assignment Directions: Answer the following questions and solve the following problems, given the following context. Demi the dietician experiments with a salt-free diet for her patients with high blood pressure. She monitored blood pressure readings, which are presumably normally distributed, both before and after her patients followed her salt-free diet for two weeks. This experiment yielded the following results: Before salt-free diet 95 108 89 94 104 97 90 1 12 After salt-free dieting 94 104 90 94 1 03 98 90 108 She wonders if there is any significant difference, for better or for worse, in the blood pressure of her patients. Use both hypothesis testing and confidence interval methods to answer her question at the 20% level of significance