Final answer:
IQ scores in the normal model with a mean of 100 and a standard deviation of 15 range from below average to superior.
Step-by-step explanation:
The description of IQ scores according to the normal model with a mean of 100 and a standard deviation of 15 is as follows:
- An IQ score of 85 or below is considered one standard deviation below the mean.
- An IQ score between 85 and 115 is considered average, with 68% of the population falling within this range.
- An IQ score of 115 or above is considered above average, with 16% of the population falling within this range.
- An IQ score of 130 or above is considered superior.
For example, a score of 70 would be described as 'one standard deviation below the mean' and a score of 115 would be considered average.