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Eight-year-old Terry's performance on an intelligence test is at a level characteristic of an average 5-year-old. Which of the following is most likely Terry’s IQ score?

a. 6
b. 4
c. 5
d. 8

Answer :

Answer:

The correct option is C

Explanation:

If say a child is 8 years has an IQ score that is the same with the score of an average 10 years old child, the mental score of that child is 10. From our example, if Terry who is 5 years performs as an average 5-year old child, then his mental score is 5. However the IQ Score will be

5/5 * 100 (Since 100 is the average IQ Score) = 100

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Rewritten by : Barada

None of the answer choices provided (a, b, c, d) are correct for calculating Terry's IQ, which should be 62.5 based on the IQ formula and rounded to the nearest whole number.

Terry's IQ score would be if his performance on an intelligence test corresponds to an average five-year-old's performance, although Terry himself is eight years old. To calculate IQ, we use the formula: IQ = mental age / chronological age times 100. As such, if Terry's mental age is that of an average 5-year-old, his IQ would be calculated as follows: IQ = 5 / 8 times 100 = 62.5. Since IQ scores are typically reported as whole numbers, Terry's IQ would be rounded to the nearest whole number, which is not directly represented in the options provided. However, based on the logic of the standard IQ calculation, none of the provided answer choices (a. 6, b. 4, c. 5, d. 8) would be correct.