Katie 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 14 obituaries from newspapers from rural towns in idaho give x¯=79.04 and s=2.08. does this sample provide evidence that people living in rural idaho communities live longer than 77 years?
(a) state the null and alternative hypotheses: (type "mu" for the symbol μ , 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) h0 : ha:
(b) find the test statistic, t =
(c) answer the question: does this sample provide evidence that people living in rural idaho communities live longer than 77 years? (use a 10% level of significance) (type: yes or no)