A Researcher Gives IQ Tests to a Large Group of Adults

question 82

Multiple Choice

A researcher gives IQ tests to a large group of adults, and discovers that the
mean, median and mode all equal 100. The highest score in the group was 130
and the lowest was 70. Between IQ's of 75 and 125, 80% of the group was found, and 50% were found between IQ's of 90 and 110. The shape of the graphed distribution was mesokurtic.
-The interdecile range was equal to

• A) 60
• B) 50
• C) 20
• D) 0

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Definitions:

Air Vent

An opening or passage through which air can be circulated for ventilation or heating and cooling purposes.

Filter

A device or material that removes particles or impurities from air, liquid, or gases by physical, chemical, or biological means.

Sodium Level

The concentration of sodium ions in the blood, important for maintaining fluid balance in the body.

Potassium Level

The measure of potassium concentration in the blood, essential for maintaining normal cell function.