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Exercise 31

Avg difficulty 2.5

A researcher works on a study and found the sample mean to be 84.5 cm and the standard error of estimate to be 0.11 cm. What is the margin of error for the 95% confidence level? What is the 95% confidence interval for the true mean? Interpret the results.

Lee et al., Math in Society, §3.5 The Normal Distribution, Exercise 31

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Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.