Diego is 6 years old,but on intelligence tests he scores at the level typical for an 8-year-old.What is Diego's IQ using the intelligence quotient formula developed by William Stern

Question

Quizplus · Accepted Answer

The intelligence quotient (IQ) formula developed by William Stern is: 
IQ = (mental age/chronological age) x 100 
Diego's mental age is 8 and his chronological age is 6. 
IQ = (8/6) x 100 = 133.33 
Rounding to the nearest whole number, Diego's IQ score would be 133. Therefore, the correct answer choice is D).

Diego Is 6 Years Old,but on Intelligence Tests He Scores