Lodging Cost. A travel association claims that the mean daily lodging cost for two adults traveling together on vacation in San Francisco is at least $240. A random sample of 24 such groups of adults has a mean daily lodging cost of $233 and a standard deviation of $12.50. Is there enough evidence to reject the claim at alpha = 0.10? Notice that the sample size if < 30. That will determine whether you use the t-test or the z-test.
Show your hand calculations OR explain how you used Excel to solve.