A portion of the monthly stock prices (rounded to the nearest dollar) for Starbucks Corp. and Panera Bread Co. from 2010 to 2013 are reported in the following table.

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?

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Date January 2010 February 2010 Starbucks Corp. Panera Bread Co. $22 23 $71 73 December 2013 78