The U.S. Census Bureau reported that the mean area of U.S. homes built in 2015 was 2467
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The U.S. Census Bureau reported that the mean area of U.S. homes built in 2015 was 2467 square feet. Assume that a simple random sample of 20 homes built in 2017 had a mean area of 2543 square feet, with a standard deviation of 225 square feet. Assume the population of areas is normally distributed. Can you conclude that the mean area of homes built in 2017 is greater than that of homes built in 2015? Use the α = 0.01 level of significance.
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