(c) For the ANOVA test, it is assumed that the population variances of daily sales are equal for each mode of advertisement studied. What is an unbiased estimate of this common population variance based on the sample variances? (d) What is the p-value corresponding to the F statistic for the ANOVA test? Round your answer to at least three decimal places. ? (e) Using the 0.05 level of significance, can the marketing managers conclude that the mean daily sales arising from at least one of the modes of advertisement differs from that of the others? OYes ONo

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