GROWTH DEVELOPMENT CHILD
VARIATIONS IN PSYCHOLOGICAL ATTRIBUTES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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is approximately normal or bell-shaped
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shows that most score between 80 and 100
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reveals a difference in the average for men and women
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falls off abruptly above 100
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Detailed explanation-1: -IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. About 68% of individuals have IQ scores in the interval 100 ± 1 ( 15 ) = [ 85, 115 ] .
Detailed explanation-2: -Approximately 95% of the population has IQ scores between 70 and 130. Approximately 99.7% of the population has IQ scores between 55 and 145. Only approximately 0.3% of the population has IQ scores outside of this interval (less than 55 or higher than 145).
Detailed explanation-3: -Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 20.
Detailed explanation-4: -A graph of intelligence quotient (IQ), a measure of human intelligence, is an example of normal distribution, in which the most frequent scores are clustered near the center. The mean score is 100. The shaded region between 85 and 115 accounts for about 68 percent of the total area, hence 68 percent of all IQ scores.
Detailed explanation-5: -Because an individual’s score on an IQ test depends on a very large number of hereditary and environmental factors, the central limit theorem explains why the distribution of IQ scores is approximately normal.