micahatwood03
08.11.2019 •
Business
The mean income per person in the united states is $41,500, and the distribution of incomes follows a normal distribution. a random sample of 10 residents of wilmington, delaware, had a mean of $47,500 with a standard deviation of $10,600. at the 0.010 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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Ответ:
0.010 level of significance = z value of -2.33
41,500-47,500/(10,600/3.1)= -1.754
Z value is less than -2.33 which means that there is not enough evidence to conclude that residents of wilmington have more income than the national average at significance level of 0.010
Explanation:
Ответ:
270
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