Child Psychology Exam Prep

Category - Child Psychology

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If the scores on a particular test fit the normal bell shaped curve distribution, what percentage of scores should fall between +2 and - 2 standard deviations from the mean?

Less than 50%
About 68%
About 95%
More than 99%

Explanation

Answer: C - On a normal bell shaped curve distribution, approximately 95% of the total number of scores falls within the boundaries of -2.0 and +2.0 standard deviations. The standard deviation serves as a yardstick indicating how far an individual’s score on a particular area of functioning deviates from the mean, the average score.

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