Question

a population characteristic is normally distributed. approximately what percentage of the population lies within
a 48%
b 68%
c 95%
d 99%

Explanation:

Step1: Recall empirical rule

For a normal - distribution, about 68% of the data lies within 1 standard - deviation of the mean, about 95% lies within 2 standard - deviations of the mean, and about 99.7% lies within 3 standard - deviations of the mean. Without further information about the number of standard - deviations, if we assume the common case of within 1 standard - deviation, the percentage is 68%.

Answer:

B. 68%