How are IQ scores distributed in the population?

a) Uniform distribution

b) Normal distribution

c) Skewed distribution

d) Exponential distribution

b

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.