The normal distribution has a greater percentage of its area close to the mean and much less in the tails.
-Which of the following is true about the distribution of IQ scores?
A) It is a standard normal distribution.
B) The area under its bell-shaped curve is 5.
C) The area under its bell-shaped curve is 1.
D) Its distribution is skewed to the left.

Question

Quizplus · Accepted Answer

The area under any normal distribution's bell-shaped curve is always equal to 1. Therefore, option C is the correct answer. Option A is incorrect because IQ scores have their own specific mean and standard deviation, so they are not necessarily standard normal. Option B does not make sense as the area cannot be a specific number like 5. Option D is incorrect because the normal distribution is symmetric, meaning it is not skewed to the left or right.

The Normal Distribution Has a Greater Percentage of Its Area