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Mathematics, 30.05.2020 20:04 ayoismeisjjjjuan
The mean income per person in the United States is $39,000, and the distribution of incomes follows a normal distribution. A random sample of 15 residents of Wilmington, Delaware, had a mean of $50,000 with a standard deviation of $9,600. At the 0.025 level of significance, is that enough evidence to conclude that residents of Wilmington, Delaware, have more income than the national average
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The mean income per person in the United States is $39,000, and the distribution of incomes follows...
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