Practice Quiz

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?
  1. Less than 50%
  2. About 68%
  3. About 95%
  4. 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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