Question

In a normal distribution, 68% of the data fall within how many standard deviations of the mean? O A. Two standard deviations O B. One standard deviation O C. It cannot be determined from the given information. D. Three standard deviations

Answer 1

B. One standard deviation

In a normal distribution, approximately 68% of the data fall within one standard deviation of the mean because of the empirical rule, also known as the 68-95-99.7 rule. This rule states that in a normal distribution, about 68% of the data values will fall within one standard deviation of the mean, about 95% will fall within two standard deviations of the mean, and about 99.7% will fall within three standard deviations of the mean.