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Jackson's Food Marts marketing director, read from a national grocery magazine that the average wait time...

Jackson's Food Marts marketing director, read from a national grocery magazine that the average wait time at a convenience food mart is 2.5 min. He took a random sample of 20 shoppers at the Jackson's Food Mart. The average wait for the sample shoppers was 2.8 minutes with a standard deviation of 1.5 minutes. He asked you if the average wait time at the Jackson's Food Mart was really less than the national average stated in the magazine or was it just sampling error. Run a hypothesis test on the sample with a 0.05 significance level. What is your conclusion?

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omple nean popolchen Muan 2.5 th : 시.. 2.5 2.9-2.5 34 y 1. S J20 ト。bulahan nuanu.uan -than 2.5 ,at the o.15 Signifhane haust

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