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A 12-year-old who responded to the original Stanford-Binet test with the proficiency typical of an average 9-year-old is said to have an IQ of _____.

Answer :

The value of IQ is 75.

IQ(Intelligent quotient):

It is a measure of intelligence, which is applied by using the ratio of mental age to physical or chronological age, then multiply by 100.

Here we have to find the IQ:

Formula to find the IQ:

IQ =( mental age/ chronological age )× 100

Mental age = 9

chronological age = 12

Put the values in the equation, and we have:

IQ = 9/ 12 × 100

= 3 × 25

= 75

Therefore we get the IQ as 75.

To know more about the IQ( intelligent Quotient) refer to the link given below:

https://brainly.com/question/6352562

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