SCENARIO 12-7 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 Scenario 12-7, there is sufficient evidence to conclude that the proportions between Hong Kong and New York are different at a 0.05 level of significance.

Question

SCENARIO 12-7 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 Scenario 12-7, there is sufficient evidence to conclude that the proportions between Hong Kong and New York are different at a 0.05 level of significance.

Quizplus · Accepted Answer

The scenario does not provide enough information to determine if there is a difference between the proportions of minibar charges posted correctly in all three cities. However, it does state that there is evidence of a difference between Hong Kong and New York. In order to determine if there is evidence of a difference in proportion between the cities, we need to conduct a hypothesis test using a chi-square test for independence. If the test results in a p-value less than or equal to 0.05, we can reject the null hypothesis of no difference in proportions and conclude that there is evidence of a difference. Since the question states that there is evidence of a difference between Hong Kong and New York, we can assume that the chi-square test resulted in a p-value less than 0.05, and therefore the answer is A.

SCENARIO 12-7 Data on the Percentage of 200 Hotels in Each