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:

Pregnant

The condition of having a growing fetus inside the female body.

Uterine Fibroids

Noncancerous growths in the uterus that can develop during a woman's childbearing years.

Uterus

A major female reproductive organ in which a fertilized egg implants and develops into a fetus.

Conceive

The act or process of becoming pregnant, involving the fertilization of an egg by sperm.