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Creatinine levels in individuals without kidney disease are normally distributed with mean 0.9 mg/dL and standard deviation 0.3 mg/dL. Suppose you take a random sample

Creatinine levels in individuals without kidney disease are normally distributed with mean 0.9 mg/dL and standard deviation 0.3 mg/dL.

Suppose you take a random sample of 9 individuals without kidney disease. What is the probability that the mean creatinine of these 9 individuals will be greater than 1 mg/dL?

  • 5%
  • 32 %
  • >99%
  • 16 %

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