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Back to 9.5 Additional Information and Full Hypothesis Test Examples

9.5 Exercise 59

Avg difficulty 2.5

Toastmasters International cites a report by Gallup Poll that 40% of Americans fear public speaking. A student believes that less than 40% of students at their school fear public speaking. The student randomly surveys 361 schoolmates and finds that 135 report they fear public speaking. Conduct a hypothesis test to determine if the percent at their school is less than 40%.

OpenStax Introductory Statistics 2e, 9.5 Additional Information and Full Hypothesis Test Examples, exercise 59

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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.