Scores on a Test Are Normally Distributed with a Mean

question 154

Multiple Choice

Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selected students, at least 20 of them score greater than 78.

• A) 0.1736
• B) 0.0113
• C) 0.0166
• D) 0.0239

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Definitions:

Unconscious Content

Elements within the mind that a person is not directly aware of but that influence emotions and behavior.

Acknowledging

The act of recognizing or admitting the existence or truth of something.

Toilet Trained

The process by which a young child learns to use the toilet for urination and defecation.