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Back to 8.3 A Population Proportion

8.3 Exercise 7

Avg difficulty 2.5

Out of a random sample of 65 freshmen at State University, 31 students have declared their majors. Use the plus-four method to find a 96 percent confidence interval for the true proportion of freshmen at State University who have declared their majors.

OpenStax Statistics, 8.3 A Population Proportion, exercise 7

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Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.