(Choose 1 answer)
(See picture)
A. (iii)
B. (i)
C. (ii)
D. None of the other choices is correct.
E. (iv)
The owner of a local nightclub has recently surveyed a random sample of n=250 customers of the club. She would now like to determine whether or not the mean age of her customers is equal to 30. If so, she plans to alter the entertainment to appeal to an older crowd. If not, no entertainment changes will be made. If she wants to have a level of significance at 0.01, what rejection region should she use?
Let t0.01:249 2.3414; t_{0.005:249}=2.5957
(i)Reject Ho if test statistic t<-2.3414
(ii)Reject Ho if test statistic t>-2.5957
(iii) Reject Ho if test statistic t>2.3414
(iv)Reject Ho if test statistic t<2.5957
E 45
