A literary critic wants to establish that the mean number of words per sentence, appearing in a newly discovered short story, is different from 9.1 words.
A sample of 36 sentences provided the data
 = 8.6 and s = 1.2
(a) Formulate the null and alternative hypotheses. (Define any symbols you use.)
(b) Determine the test statistic.
(c) Give the form of the rejection region.
(d) What is the conclusion to your test? Take α = .10.
(e) Calculate a P-value.
(f) Based on part (d), what error could you have possibly made?