The Scores on a Certain Test Are Normally Distributed with a Mean

question 19

Multiple Choice

The scores on a certain test are normally distributed with a mean score of 58 and a standard deviation of 4. What is the likelihood that a sample of 90 students will have a mean score of at least 58.4216?

• A) 0.8413
• B) 0.3413
• C) 0.3174
• D) 0.1587

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Definitions:

Small Lakes

Bodies of freshwater of relatively small size and depth, often found inland and formed by a variety of geological processes.

Boreal Forest Biome

A vast biome characterized by coniferous forests, cold temperatures, and short growing seasons, located in the northern regions of North America, Europe, and Asia.

Deciduous Trees

Trees that shed their leaves annually, typically in the autumn, to conserve water during the winter or dry season.

Limnetic Zone

The open water away from the shore of a lake or pond extending down as far as sunlight penetrates. Compare with littoral zone and profundal zone.