Question: According to the U.S. Census Bureau, the average American generates 4.4 pounds of garbage per day. Suppose we believe that because of recycling and a

According to the U.S. Census Bureau, the average American generates 4.4 pounds of garbage per day. Suppose we believe that because of recycling and a greater emphasis on the environment, the figure is now lower. To test this notion, we take a random sample of Americans and have them keep a log of their garbage for a day. We record and analyze the results by using a statistical computer package. The output follows.

Describe the sample. What statistical decisions can be made on the basis of this analysis? Let alpha be .05. Assume that pounds of garbage per day are normally distributed in the population. Discuss any substantiveresults.

One-Sample Z Test of mu -4.4 vs < 4.4 The assumed standard deviation0.866 95% Upper Mean SE Mean Bound 22 3.969 0.185 4.273 -2.33 0.010

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