OpenStax, Introductory Business Statistics 2e §8.4 Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 6 · Statistics · Confidence intervals
Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 6
The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people. The sample mean is 8.2 minutes. There is a known standard deviation of 2.2 minutes. The population distribution is assumed to be normal.
Identify the following:
(a) = _____
(b) σ = _____
(c) n = _____
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Introductory Business Statistics 2e · §8.4 Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 6
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