Additional Information and Full Hypothesis Test Examples · Exercise 37

For each of the word problems, use a solution sheet to do the hypothesis test. The solution sheet is found in Appendix E, Solution Sheets. Please feel free to make copies of the solution sheets. For the online version of the book, it is suggested that you copy the.doc or the.pdf files.

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

This exercise builds on another exercise in its source book, which isn't shown here.

OpenStax, Statistics · §9.5 Additional Information and Full Hypothesis Test Examples · Exercise 37