High School

Lily is 10 years old. She gets a score of 97 on an IQ test. What does this tell us about her intellectual ability?

A. Lily must be a very smart girl—100 is a perfect score.
B. Lily is brighter than almost two-thirds of her age-mates, as IQ scores go up to about 150.
C. Lily's score is in the bottom fifth of the population.
D. Lily's score is about average for her age group.

Answer :

d. lily's score is about average for her age-group.

Final answer:

Understanding IQ scores, Lily's IQ of 97 is slightly below average for her age group, showing she does not fall into the giftedness category.

Explanation:

IQ is calculated by dividing mental age by chronological age and multiplying by 100. An IQ of 100 represents average intelligence for an age group. Lily's score of 97 indicates she performs slightly below average for her age.

About 3% of the population scores above 130, considered the threshold for giftedness, while a similar percentage scores below 70, the threshold for intellectual disability.

IQ scores are distributed in a Normal Distribution, showing that the majority cluster around 100, with fewer at the extremes. Lily's IQ of 97 falls within the average range.

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