10.87 Check the outliers.
The plot you generated in Exercise 10.85 has two observations that appear to be outliers.
10.87
(a) They are very large hotels with more than 1000 rooms. (b) The analysis changes drastically. . The data are no longer significant at the 5% level with these outliers removed. The previous results likely are not valid as the significance seen was just due to these 2 outliers.