Given the significance level=0.01, find the following:

(a)left-tailedz value

(b)right-tailedz value

(c)two-tailedz value

Ben thinks that people living in a rural environment have a healthier lifestyle than other people. He believes the average lifespan in the USA is 77 years. A random sample of 9 obituaries from newspapers from rural towns in Idaho givex(mean)=79.79 ands=2.93. Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years?

(a) State the null and alternative hypotheses:

(b) Find the test statistic, t =