Assertion: 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.
Reasoning: The distribution of IQ scores follows a normal curve, with a asymmetrical distribution around the mean.
Answer & explanation
Correct answer: option 3
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.