According to the CDC report, the mean life expectancy in the US population is currently (µ) 82.6 years with a standard deviation (σ) of 8. A researcher examined the age of death of 350 people recently recorded in several Arizona hospitals and calculated the mean to be 76.5 years old. He runs a two-tailed Z test with α = .05 to see if Arizona has a significantly different life expectancy compared to the US population. Because the researcher is not predicting a direction, the hypotheses should be non-directional. For this question, leave answers in the original decimal places. A. What are the null hypothesis and alternative hypothesis?
