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Mathematics, 08.11.2019 05:31 rodneisha1313

Agrocery store has an average sales of $8000 per day. the store introduced several advertising campaigns in order to increase sales. to determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected. it was found that the average was $8300 per day. from past information, it is known that the standard deviation of the population is $1200.(provide mathematical steps and explanations in detail to receive full credit.) the researcher would like to test the following hypothesis : ? ? ? 8,000 : ? ? > 8,000 (a) calculate the value of the test statistic. let ? =0.05 (b) what is the conclusion based on the critical value approach? let ? =0.05 (c) what is the conclusion based on the p-value value approach? let ? =0.05

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