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engineering
mechanical engineering
august 2022
28

Mechanical Engineering Questions and Answers August 28, 2022

Expert-verified solutions to help you succeed

The mean income per person in the United States is 40,500, and the distribution of incomes follows a normal distribution. A random sample of 18 residents of Wilmington, Delaware, had a mean of 51,500 with a standard deviation of 10,200. At the 0.050 level of significance, is that enough evidence to conclude that residents of Wilmington, Delaware,

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