# statics

Q: The mean annual salary for a sample of electrical engineers is \$83,500, with a standard deviation

The mean annual salary for a sample of electrical engineers is \$83,500, with a standard deviation of \$1500. The data set has a bell-shaped distribution.
(a) Use the Empirical Rule to estimate the percent of electrical engineers whose annual salaries are between \$80,500 and \$86,500.
(b) In a sample of 40 additional electrical engineers, about how many electrical engineers would you expect to have annual salaries between \$80,500 and \$86,500?
(c) The salaries of three randomly selected electrical engineers are \$90,500, \$79,750, and \$82,600. Find the z-score that corresponds to each salary. Determine whether any of these salaries are unusual.

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