Question

what percentage of scores falls within 3 standard deviations of the mean? 99.7% 68% 95% 34%

Explanation:

According to the empirical rule (68 - 95 - 99.7 rule) in statistics, for a normal distribution:

• Approximately 68% of the data lies within 1 standard deviation of the mean.
• Approximately 95% of the data lies within 2 standard deviations of the mean.
• Approximately 99.7% of the data lies within 3 standard deviations of the mean.

Answer:

99.7%