At an Academically Challenging High School, the Average GPA of a High

question 9

Multiple Choice

At an academically challenging high school, the average GPA of a high school senior is known to be normally distributed with a variance of 0.25. A sample of 20 seniors is taken and their average GPA is found to be 2.71. Develop a 90% confidence interval for the population mean GPA.

• A) [2.5261, 2.8939]
• B) [2.5667, 2.8533]
• C) [2.6180, 2.8020]
• D) [2.6384, 2.7816]

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Definitions:

Psychologists

Professionals specializing in the study of the mind and behavior, exploring various aspects of human thought, emotions, and actions.

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