Question: 6) A time study analysis viewed an assembly line task at the new Texas factory. A preliminary study yielded a mean of 15 minutes and

6) A time study analysis viewed an assembly line task at the new Texas factory. A preliminary study yielded a mean of 15 minutes and a standard deviation of 5 minutes. The desired confidence level is 95 percent. How many observations will be needed (including those already taken) if the desired error is 2 minutes

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