The Orange County Bureau of Weights and Measures reports that the Windsor Bottling Company pours 12 ounces of root beer in its cans. An employee at that company disputes this claim. She takes a random sample of 32 cans and finds average ounces of 11.3 with a standard deviationof .7. Test the null hypothesis at the .01 level of significance. Calculate the confidence interval.
Show your work.
With a confidence interval, do I use the same test statistic formula I do for everything else?