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Confidence interval for mean

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A random sample of 16 Google managers yield the following information on annual salaries. The sample mean is $69,000, with a sample standard deviation of $4,000

1)How many google managerswould need to be selected to generate a 95%confidence interval with a margin of error of plus or minus $1000.

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The solution provides a step by step method for computing confidence interval for mean is given in the answer.

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Confidence interval
A random sample of 16 Google managers yield the following information on annual salaries. The sample mean is $69,000, with a sample standard ...

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