At a Particular Academically Challenging High School, the Average GPA

question 27

Multiple Choice

At a particular academically challenging high school, the average GPA of a high school senior is known to be normally distributed. After a sample of 20 seniors is taken, the average GPA is found to be 2.71 and the variance is determined to be 0.25. Find a 90% confidence interval for the population mean GPA.

• A) [2.5167, 2.9033]
• B) [2.5261, 2.8961]
• C) [2.5615, 2.8585]
• D) [2.6358, 2.7842]

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Definitions:

Conceptual Skill

The ability to understand complex situations and to develop creative and effective solutions.

Katz's Skills Model

A leadership theory identifying three essential skills for effective management: technical, human, and conceptual skills.

Social Judgment Skill

The ability to understand and interpret the feelings, thoughts, and behavior of others in social situations.

Mental Structures

The frameworks of the mind that support understanding, reasoning, decision-making, and memory.