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Exercise 29

Avg difficulty 2.5

A random sample of 45 people who carry a purse found that they had an average of $2.35 in change in the bottom of their purse. The margin of error was $0.15. Calculate the 95% confidence interval and interpret the results.

Lee et al., Math in Society, §3.5 The Normal Distribution, Exercise 29

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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.