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Back to 9.5 Additional Information and Full Hypothesis Test Examples

9.5 Exercise 77

Avg difficulty 2.5

The student academic group on a college campus claims that first-year students study at least 2.5 hours per day, on average. One Introduction to Statistics class was skeptical. The class took a random sample of 30 first-year students and found a mean study time of 137 minutes with a standard deviation of 45 minutes. At α = 0.01 level, is the student academic group’s claim correct?

OpenStax Introductory Statistics 2e, 9.5 Additional Information and Full Hypothesis Test Examples, exercise 77

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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.