How are IQ scores distributed in the population?
a) Uniform distribution
b) Normal distribution
c) Skewed distribution
d) Exponential distribution
Answer & explanation
Correct answer: option 2
IQ scores are distributed in the population in such a way that the scores of most people tend to fall in the middle range of the distribution. Only a few people have either very high or very low scores. The frequency distribution for the IQ scores tends to approximate a bellshaped curve, called the normal curve. This type of distribution is symmetrical around the central value, called the mean.