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A sample of 100 college graduates is obtained and the mean salary is found to be...

A sample of 100 college graduates is obtained and the mean salary is found to be $ 43704 with a standard
deviation of $9879. Find the margin error E associated with a 95% C. I.

Math   Statistics-And-Probability   
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Answer #1

Z for 95% confidence interval = Z0.025 = 1.96

Margin of error, E = Z0.025 * sd / sqrt(n)

                             = 1.96 * 9879 / sqrt(100)

                             = 1936.284 (ans)

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