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The philadelphia zoo reports that the life span of the Galapagos tortoise follows a normal distribution with a mean of 100 years and a standard

The philadelphia zoo reports that the life span of the Galapagos tortoise follows a normal distribution with a mean of 100 years and a standard deviation of 15 years. Describe the sampling distribution of the mean life span of a sample of 12 Galapagos tortoises

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