At Hershey’s, the chocolate maker, a particular candy bar is supposed to weigh 11 ounces. However, the company has received complaints that the bars are under weight. To assess this situation, the company has conducted a statistical study that concluded that the average weight of the candy is indeed 11 ounces.

However, a consumer organization, while acknowledging the finding that the mean weight is 11 ounces, claims that more than 50% of the candy bars weigh less than 11 ounces and that a few heavy bars pull the mean up, thereby cheating a majority of customers. A sample of 20 candy bars was selected.

The data obtained follow:

10.9 11.7 10.5 11.8 10.2 11.5 10.8 11.2 11.8 10.7 10.6 10.9 11.6 11.2 11.0 10.7 10.8 10.5 11.3 10.1 Test the consumer organization’s claim at a significance level of 0.05.