The probability that a randomly selected case will have a score beyond$\pm$1.00 standard deviation of the mean is
A)0.6826.
B)0.5000.
C)0.3174.
D)1/2 of the area of 1 standard deviation.

Question

Quizplus · Accepted Answer

According to the Empirical Rule, about 68% of the data falls within one standard deviation of the mean, and about 32% falls beyond one standard deviation. Therefore, the probability of a randomly selected case having a score beyond one standard deviation of the mean is approximately 0.3174.

The Probability That a Randomly Selected Case Will Have a Score