Question

A survey claims that the average cost of a hotel room in Tulsa, Oklahoma, is less than $49.21. In order to test this claim, a researcher selects a sample of 26 hotel rooms and finds the average cost equal to $47.37 with a sample standard deviation of $6.42. Assume the population random variable is normal. At alpha=.1.

Answer 1

Ans- n =26 = 47.37 .5=$ 6042 a =0.1 we want to test, Ho: el = $ 49.21 el< $ 49.21 H Test statistic is, - X-ef- 47.37 – 49.21 6.42 126 -1.84 1.2590 slun t = - 1.461 - t-critical value = -1-316 ... from t-table since t-calculated < t-critical value Hence we reject the null hypothesis. And conclude that the average wit of a hotel room in Tulsa, Oklahoma is less than $49.21 CScanned with CamScanner