Like most characteristics of a population, WAIS-IV scores are distributed in a bell or normal curve. Which of the following is an accurate characteristic of those types of curves?
A) Scores are evenly distributed across the population.
B) Scores are clumped around the midpoint.
C) The curve resembles an "S."
D) Scores are more common at the ends of the distribution.

Question

Like most characteristics of a population, WAIS-IV scores are distributed in a bell or normal curve. Which of the following is an accurate characteristic of those types of curves?
A) Scores are evenly distributed across the population.
B) Scores are clumped around the midpoint. 
C) The curve resembles an "S." 
D) Scores are more common at the ends of the distribution.

Quizplus · Accepted Answer

Normal curves, also known as bell curves, have a symmetrical shape with most scores clustering around the midpoint, or the mean of the distribution. This means that option B is the most accurate characteristic of the normal curve. Option A is incorrect because normal curves are not necessarily evenly distributed. Option C is incorrect because normal curves do not resemble S-shaped curves. Option D is incorrect because scores are actually less common at the ends of the distribution, known as the tails.

Like Most Characteristics of a Population, WAIS-IV Scores Are Distributed