Use the following information for questions:
A shopper wanted to test whether there was a difference in the average waiting times at the check-out counter among 5 different supermarkets. She selected a random sample of 20 shoppers from each of the five supermarkets.
-What is the alternative hypothesis for this situation?
A) The average waiting time to check out is 25 minutes for all five supermarkets.
B) The average waiting time to check out is the same for all five supermarkets.
C) The average waiting time for each of the 100 shoppers is different.
D) The average waiting time to check out is not the same for all five supermarkets.

Question

Use the following information for questions:
 A shopper wanted to test whether there was a difference in the average waiting times at the check-out counter among 5 different supermarkets. She selected a random sample of 20 shoppers from each of the five supermarkets.
-What is the alternative hypothesis for this situation?
A) The average waiting time to check out is 25 minutes for all five supermarkets.
B) The average waiting time to check out is the same for all five supermarkets.
C) The average waiting time for each of the 100 shoppers is different.
D) The average waiting time to check out is not the same for all five supermarkets.

Quizplus · Accepted Answer

The alternative hypothesis challenges the null hypothesis by suggesting that there is a difference in the parameter being tested, in this case, the average waiting times among the supermarkets. Therefore, stating that the average waiting times are not the same for all five supermarkets directly opposes the notion of equality among the groups, which is what an alternative hypothesis does.

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