What proportion of scores are equal to a SD=1 in a normal distribution?

Question

Quizplus · Accepted Answer

In a normal distribution, approximately 34.13% of scores fall within one standard deviation above or below the mean. Therefore, option C is correct. Option A (68.26%) represents the proportion of scores falling within two standard deviations, and option B (13.59%) represents the proportion of scores falling within one standard deviation on either side of the mean. Option D is incorrect as one of the other options is correct.

What Proportion of Scores Are Equal to a SD=1 in a Normal