Sixty eight percent of the cases in a normal distribution with a mean of 100 and a standard deviation of 10 would fall between:

Question

Quizplus · Accepted Answer

In a normal distribution, 68% of the cases fall within one standard deviation above and below the mean.

So, in this case, 68% of the cases would fall between:

Mean + 1 standard deviation = 100 + 10 = 110

Mean - 1 standard deviation = 100 - 10 = 90

Therefore, the best choice is B, which includes the range between 90 and 110.

Sixty Eight Percent of the Cases in a Normal Distribution