A theater is interested in estimating the variance in sales at the snack bar on Friday nights. Suppose a random sample of 14 Friday evenings is selected and the snack bar sales for each evening are recorded. The results of the sample in dollars are shown in the accompanying table. Use the random sample of sales to develop a 90% confidence interval estimate of the variance of Friday night snack bar sales. 279.12 365.92 324.79 335.58 $50²s $ (Round to the nearest cent as needed.) 318.48 317.14 353.68 356.63 344.96 317.39 304.41 353.16 323.34 293.76

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