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Michigan has had restrictions on price advertising for wine However

Michigan has had restrictions on price advertising for wine. However, for a period these restrictions were lifted. Data were collected on total wine sales over three periods of time-under restricted price advertising, with restrictions lifted, and after the re-imposition of restrictions. The accompanying table shows sums of squares and degrees of freedom. Assuming that the usual requirements for the analysis of variance are met-in particular, that sample observations are independent of one another-test the null hypothesis of equality of population mean sales in these three time periods.

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