On the Average, a Student Takes 100 Words/minute Midway Through

question 11

Multiple Choice

On the average, a student takes 100 words/minute midway through an advanced court reporting course at the American Institute of Court Reporting. Assuming that the dictation speeds of the students are normally distributed and that the standard deviation is 20 words/minute, what is the probability that a student randomly selected from the course can take dictation at a speed between 90 and 120 words/minute?

• A) The probability is 0.6428.
• B) The probability is 0.7860.
• C) The probability is 0.5328.
• D) The probability is 0.5438.

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Definitions:

Terminal Moraine

A mound or ridge of debris deposited at the end of a glacier, marking its furthest advance.

Glacier

A large, slow-moving river of ice, formed from compacted layers of snow, that shapes the landscape through its movement and melting.

U-Shaped Valley

A type of valley formed by the erosive action of glaciers, characterized by its U-shaped cross-section.

Lateral Moraine

A deposit of debris along the sides of a glacier, formed from the accumulation of material eroded from the valley walls.