Use the Range Rule of Thumb to Estimate the Standard

question 21

Multiple Choice

Use the range rule of thumb to estimate the standard deviation to the nearest tenth.
-22, 29, 21, 24, 27, 28, 25, 36

• A)2.8
• B)1.7
• C)4.2
• D)3.8

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Definitions:

Intelligence Tests

Standardized assessments designed to measure cognitive abilities, including reasoning, problem-solving, and understanding.

Chronological Age

The actual age of a person measured in years from their date of birth.

Mental Age

A measure of an individual's cognitive ability expressed as the age at which an average individual reaches the same ability level.

Critical Age

A specific period in development during which an individual is particularly receptive to acquiring certain skills, such as language, often hypothesized to end at puberty.