Answer :
Final answer:
Martin's IQ would approximately be 83, which is calculated using his mental age (as per his score) and his chronological age.
Explanation:
In the context of the Stanford-Binet intelligence test, a child's IQ (intelligence quotient) is determined by comparing the mental age that the child achieves on the test to the child's chronological age, then multiplying the ratio by 100. For example, if a child’s mental age equals his or her chronological age, the IQ would be 100.
In Martin's case, though he is 18 years old, he scored at a level equivalent to an average 15-year-old. The process of finding his IQ would involve the equation:
IQ = (Mental Age / Chronological Age) x 100
Substituting the values:
IQ = (15 / 18) x 100
After doing the math, we find Martin's IQ to be approximately 83.
Learn more about Stanford-Binet Intelligence Test here:
https://brainly.com/question/33538068
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