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

Question

Quizplus · Accepted Answer

In a normal distribution, 34.13% of scores fall within the interval from the mean to one standard deviation below the mean. This is because the total area under the curve between one standard deviation below and above the mean is 68.26%, so half of that, which is the area from the mean to one standard deviation below, is 34.13%.

In a Normal Distribution, What Proportion of Scores Fall Within