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In a study of typical student grade-point averages (GPAs), we sample 16 students and find an average ...

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In a study of typical student grade-point averages (GPAs), we sample 16 students and find an average ...

In a study of typical student grade-point averages (GPAs), we sample 16 students and find an average GPA of 2.76, with a standard deviation of 0.48. Assuming the GPAs are normally distributed, what is an interval that we can be 80% certain contains the mean student GPA?

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(2.12, 3.40)

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(2.61, 2.91)

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(2.60, 2.92)

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(2.66, 2.86)

Textbook

Introductory Statistics: A Problem-Solving Approach

Edition: 3^rd

Author: Kokoska

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