Find the Z-Score Corresponding to the Given Value and Use

question 75

Multiple Choice

Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if it is at least three standard deviations above or Below the mean. Round the z-score to one decimal place, if necessary. A test score of 93.4 on a test having a mean of 73 and a standard deviation of 12.

• A)1.7; not unusual
• B)-1.7; not unusual
• C)1.7; unusual
• D)20.4; unusual

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Definitions:

Tying Contract

A requirement imposed by a seller that a buyer purchase another (or other) of its products as a condition for buying a desired product; a practice forbidden by the Clayton Act.

Price-fixing

An illegal agreement among competitors to maintain prices at a certain level, preventing the forces of competition from dictating market prices.

Sherman Act

The federal antitrust law of 1890 that makes monopoly and conspiracies to restrain trade criminal offenses.

Federal Energy Regulatory Commission

The Federal Energy Regulatory Commission (FERC) is a U.S. government agency that regulates the interstate transmission of electricity, natural gas, and oil.