If the plotted scores from a test represent a bell-shaped curve, then approximately ______ of the scores fall within plus or minus one standard deviation of the mean.
A) 34%
B) 50%
C) 68%
D) 95%

Question

Quizplus · Accepted Answer

The bell-shaped curve is a normal distribution, and approximately 68% of the scores fall within plus or minus one standard deviation of the mean in a normal distribution.

If the Plotted Scores from a Test Represent a Bell-Shaped