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Back to 8.1 A Single Population Mean using the Normal Distribution

8.1 Exercise 14

Avg difficulty 2.5

Use the following information to answer the next five exercises: The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. Fifty newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds.

Which distribution should you use for this problem?

OpenStax Introductory Statistics 2e, 8.1 A Single Population Mean using the Normal Distribution, exercise 14

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Adapted from Introductory Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Statistics 2e. Imported at revision 50ec917.