Foofy studies if hearing an argument in favor of an issue alters participants’ attitudes toward the issue one way or the other. She presents a 30-second argument to 8 people. In a national survey about this issue, µ = 50. She obtains X = 53.25 and sX = 569.86.
(a) What are H0 and Ha?
(b) What is tobt?
(c) With a = .05, what is tcrit?
(d) If appropriate, compute the confidence interval for µ.
(e) What conclusions should Foofy draw about the relationship?