OpenStax, Introductory Business Statistics 2e §8.4 Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 1 · Statistics · Confidence intervals
Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 1
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.
Identify the following:
(a) = _____
(b) σ = _____
(c) n = _____
OpenStax, Introductory Business Statistics 2e · §8.4 Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 1
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