Hypothesis Testing The past records of a supermarket show that its customers spend an average of...

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Hypothesis Testing The past records of a supermarket show that its customers spend an average of $165 per visit at this store. Recently management has initiated a promotional campaign to encourage customers to spend more money at the store. To verify whether the campaign is effective, the manager surveyed a random sample of 12 customers who visited and spent money at the store. The manager found that the average amount spent between the 12 customers was $181.25, with a sample standard deviation of $22.13. Did the promotional campaign increase the amount of money customers spent? Let α 0.05 1.

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We have The hypotheris is Ho,1に 165 Vs Ha , -U> 165 The test statistic is 22-13 ) 2.54 4 tn-1 ,a々も11, c-os -1.736 from t:

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9.48 The past records of a supermarket show that its customers spend an average of $95...

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Hypothesis Testing The past records of a supermarket show that its customers spend an average of...

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