The owner of a local nightclub has recently surveyed a rando

The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club. She thinks that the age of her customers is now older and greater than 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?

a) reject H0 if t < -2.3263

b) reject H0 if t < -2.5758

c) reject H0 if t < 2.3263

d) reject H0 if t < 2.5758

Solution

Here the answer is a) as the lower alpha point.