A company that manufactures washing machines wants to estimate the mean lifetime of its machines. It is

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A company that manufactures washing machines wants to estimate the mean lifetime of its machines. It is believed that standard deviation of the washing machines is 900 hours. The company wants to be within 100 hours of the mean lifetime. How large a sample must be taken in order to be 97% confident of the result?

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Posted Date: May 18, 2024 09:01 PM

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A company that manufactures washing machines wants to estimate the mean lifetime of its machines. It is

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