Question: The monthly closing stock prices (rounded to the nearest dollar) for Starbucks Corp. and Panera Bread Co. for the first six months of 2010 are reported in the following table. The data are also available on the text website, labeled Monthly Stock Prices.
a. State the null and the alternative hypotheses in order to determine if the variance of price differs for the two firms.
b. What assumption regarding the population is necessary to implement this step?
c. Use Excel's F.TEST function to calculate the p -value.
d. At α = 0.05 what is your conclusion?