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, have more income than the national average?
- State the null hypothesis and the alternate hypothesis.
- State the decision rule for 0.050 significance level. (Round your answer to 3 decimal places.)
1. The hypotheses are: H 0 : μ = 4 0 5 0 0 H a : μ > 4 0 5... View the full answer
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1) null hypotheiss, ho: residents of Wilmington, Delaware, have more income than the... View the full answer