Final answer:
The correct percentage of people scoring within 1 standard deviation of the mean for a symmetric, bell-shaped distribution is approximately 68%, not 66%, making the statement false according to the Empirical Rule.
Step-by-step explanation:
The statement about 66% of people scoring within 1 standard deviation of the mean is actually false. According to the Empirical Rule (also known as the 68-95-99.7 rule), for data having a distribution that is bell-shaped and symmetric, approximately 68 percent of the data is within one standard deviation of the mean, approximately 95 percent of the data is within two standard deviations, and more than 99 percent is within three standard deviations of the mean. Therefore, the correct percentage of people scoring within 1 standard deviation of the mean is closer to 68% rather than 66%.