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A hospital administrator wants to measure average time per hip replacement procedure performed in the institution's operating suite. He is willing to be within 10 minutes of the true value with a probability of 95%. An initial investigation of a random sample of 10 cases determined that the standard deviation of time was 40 minutes.

How large a sample will need to be taken to meet the administrator's needs?

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  • Category:- Statistics and Probability
  • Reference No.:- M91013196

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