The mean income per person in the united states is 37500

Reference no: EM13611322

The mean income per person in the United States is $37,500, and the distribution of incomes follows a normal distribution. A random sample of 12 residents of Wilmington, Delaware, had a mean of $46,500 with a standard deviation of $9,000. At the .01 level of significance, is that enough evidence to conclude that residents of Wilmington, Delaware, have more income than the national average?

1-State the decision rule for .01 significance level (3 decimal places)

2-Compute the value of the test statistic (2 decimal places)

Reference no: EM13611322

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