How large a sample is needed to get the desired information, Basic Statistics

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How large a sample is needed to get the desired information

A researcher is interested in estimating the average salary of fire fighters in a large city. He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?

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Basic Statistics: How large a sample is needed to get the desired information

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Basic Statistics: How large a sample is needed to get the desired information

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