GROWTH DEVELOPMENT CHILD
MEASUREMENT OF INTELLIGENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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50%
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68%
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95%
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99%
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Detailed explanation-1: -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.
Detailed explanation-2: -The 95% Rule states that approximately 95% of observations fall within two standard deviations of the mean on a normal distribution.
Detailed explanation-3: -From the graph we can see that 68% of the students had scores between 70 and 80. For this problem we need a bit of math. If you looked at the entire curve, you would say that 100% of all of the test scores fall under it.
Detailed explanation-4: -For example, given that the IQ scores have a mean of 100 and a standard deviation of 15, one can conclude that only about 2.3% of the population have an IQ of 130 or higher. Here is how this works.