# Question about Normal Distributions and Z-Scores

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Assume that the average annual salary for a worker in the United States is $27500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6250. Find the following:

a) What percentage of Americans earn below $18000?

b) What percentage of Americans earn above $40000?

https://brainmass.com/statistics/normal-distribution/question-about-normal-distributions-and-z-scores-163582

#### Solution Preview

Assume that the average annual salary for a worker in the United States is $27500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6250. Find the following:

a) ...

#### Solution Summary

Normal Distributions and Z-Scores are investigated. The solution is detailed and well presented. The response was given a rating of "5/5" by the student who originally posted the question.

$2.49