Scores on Standardized Intelligence Tests Are Normally Distributed with a Mean

question 82

Multiple Choice

Scores on standardized intelligence tests are normally distributed with a mean of 100 and a standard deviation of 15.This means that

• A) 50% of the population scores between 70 and 100 on standardized intelligence tests.
• B) only 5% of the population scores higher than 130 or lower than 70 on standardized intelligence tests.
• C) only 5% of the population scores higher than 115 or lower than 85 on standardized intelligence tests.
• D) 95% of the population scores between 100 and 130 on standardized intelligence tests.

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Definitions:

Likert Scale

A psychometric scale commonly involved in research that employs questionnaires, used to represent people's attitudes or feelings on a linear scale of several options ranging from one extreme to another.

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A measure of how well the service level delivered matches customer expectations.

Airlines Ranking

An evaluation or classification of airlines based on various performance metrics, such as safety, punctuality, and customer service.

Spearman Correlation

This is a non-parametric tool for measuring rank correlation, gauging how effectively a monotonic function can represent the linkage between two variables.