In a normal distribution, what proportion of scores fall within the interval between the first standard deviation below the mean to the second standard deviation below the mean?
A).6826
B).3413
C).8413
D).1359

Question

Quizplus · Accepted Answer

In a normal distribution, 34.13% of scores fall between the mean and one standard deviation below the mean, and 13.59% fall between one and two standard deviations below the mean. Therefore, the proportion between the first and second standard deviation below the mean is 13.59%.

In a Normal Distribution, What Proportion of Scores Fall Within