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# Normal Modelling of IQ Test Scores

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I find this question really difficult to answer and I need help formulating a response.

Some IQ tests are standardized to a normal model with a mean of 100 and a standard deviation of 16.

a. Draw a model for these IQ scores, clearly label it , showing what the 65-95-99.7 rule predicts about the score.

b. In what interval would you expect the central 95% of IQ scores be found

c. About what percent of people should have IQ scores above 116?

d. About what percent of people should have IQ scores between 68 and 84?

e. About what percent of people should have IQ scores abouve 132?

Thank you.

https://brainmass.com/statistics/normal-distribution/normal-modelling-iq-test-scores-478415

#### Solution Preview

Some IQ tests are standardized to a normal model with a mean of 100 and a standard deviation of 16.

a. Draw a model for these IQ scores, clearly label it , showing what the 68-95-99.7 rule predicts about the score.

68% of data lies within one standard deviation from ...

#### Solution Summary

The normal modeling of IQ test scores are examined. The interval which would you expect the central 95% of IQ scores is determined.

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