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The management of a chain of movie theaters believes the average weekend attendance at its downtown theater is greater than at its suburban theater. The following sample results were found from their accounting data

Down Town Suburban

Num. of Weekends 11 10

Average Attendance 855 750

Sample Variance 1684 1439

Do these data provide sufficient evidence to indicate there is a difference in average attendance? The company is also interested in whether there is a significant difference in the variability of attendance.