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9.5 Exercise 70

Avg difficulty 2.5

The student academic group on a college campus claims that freshman 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 freshman 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 Statistics, 9.5 Additional Information and Full Hypothesis Test Examples, exercise 70

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