Business, 16.07.2019 03:20 jagger68

The mean income per person in the united states is $50,000, and the distribution of incomes follows a normal distribution. a random sample of 10 residents of wilmington, delaware, had a mean of $60,000 with a standard deviation of $10,000. at the 0.05 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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