Sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed the mean purchase of $5.29 with the standard deviation of $3.02. For the October 26 evening showing of same movie, for a sample of 25 buys the mean was $5.12 with the standard deviation of $2.14. The means appear to be very close, but not the variances. At _ = .05, is there a difference in variances? Describe all steps clearly, comprising an illustration of the decision rule. (Data are from project by statistics students Kim Dyer, Amy Pease, and Lyndsey Smith.)