TABLE 11-7
Data on the percentage of 200 hotels in each of the three large cities across the world on whether minibar charges are correctly posted at checkout are given below.

At the 0.05 level of significance, you want to know if there is evidence of a difference in the proportion of hotels that correctly post minibar charges among the three cities.
-Referring to Table 11-7, the decision made suggests that the three cities do not all have the same proportion of hotels that correctly post minibar charges.

Question

TABLE 11-7
Data on the percentage of 200 hotels in each of the three large cities across the world on whether minibar charges are correctly posted at checkout are given below.
  
At the 0.05 level of significance, you want to know if there is evidence of a difference in the proportion of hotels that correctly post minibar charges among the three cities.
-Referring to Table 11-7, the decision made suggests that the three cities do not all have the same proportion of hotels that correctly post minibar charges.

Quizplus · Accepted Answer

To test if there is evidence of a difference in proportions among the three cities, a chi-square test for independence can be performed. If the test results in a p-value less than 0.05, then it can be concluded that there is evidence of a difference. Since the question states that a decision has already been made, and the statement suggests that the three cities do not have the same proportion of hotels that correctly post minibar charges, the answer is A.

TABLE 11-7 Data on the Percentage of 200 Hotels in Each of Each