Question

Certifcation Magazine conducted a salary survey of US IT (Information Technology) professionals, contacting a simple random sample of 7130 certified IT specialists. The sample average salary was $96,677.
a. Estimate the average salary for the population of IT professionals represented by the sample. Use a 99% confidence level and assume the standard deviation for the population of IT salaries is known to be $8200.
b. Carefully interpret the interval you produced in part a.
c. For your interval in part a, identify the margin of error term and the standard error term.


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  • CreatedJuly 16, 2015
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