Lois thinks that people living in a rural environment have a healthier lifestyle than other people. She believes the average lifespan in the USA is 77 years. A random sample of 20 obituaries from newspapers from rural towns in Idaho give x = 80.63 and s = 1.87. Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years? Assume normality. (a) State the null and alternative hypotheses: (Type "mu" for the symbol mu > e.g. mu >|1 for the mean is greater than 1. mu <] 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1) H_0: H_a: