From Past History, the Scores on a Statistics Test Are

question 44

Multiple Choice

From past history, the scores on a statistics test are normally distributed with a mean of 70% and a
Standard deviation of 5%. To earn a "B" on the test, a student must be in the top 15% of the class.
What should a student score to receive a "B"?

• A) 75.18
• B) 75.49
• C) 81.48
• D) 76.90

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Definitions:

Probabilities

The measure of the likelihood that an event will occur, often expressed as a number between 0 and 1.

Values

The importance, worth, or usefulness of something, or a set of beliefs or standards of behavior.

Null Hypothesis

A statement suggesting that there is no significant difference or relationship between specified populations, any observed effect is due to sampling or experimental error.

Statistical Hypothesis

Statement about an expected outcome or relationship involving population parameters.