standard method for the determination of glucose in serum has been reported to have a standard deviation of 0.40 mg/dL. If s→ϭ= 0.40, how many analyzes must be performed so that the mean remains within the following limits in the analysis of a sample? a) ±0.3mg/dL of true mean with 99% confidence b) ±0.3mg/dL of true mean with 95% confidence c) ±0.2mg/dL of true mean with 90% confidence

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