A store sells "16-ounce" boxes of Captain Crisp cereal. A random sample of 9 boxes was taken and weighed. The results were the following (in ounces) 15.5 16.2 16.1 15.8 15.6 16.0 15.8 15.9 16.2
sample mean = 15.9
sample standard deviation = 0.25
a) Some customers believe that the variance of the weight of boxes with Captain Crisp cereal is more than 0.05. Use alpha = 0.10 to test the customers' claim.