Hypothesis test for single mean
A large candy manufacturer is concerned that the mean weight of their bag of Gooey Sour Worms is not greater than 7.3 ounces. It can be assumed that population standard deviation is .5 ounces based on past experience. A sample of 169 gummy worms is selected and the sample mean is 7.35 ounces. By a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Fully explain the answer.