Complete the following statement about the Empirical Rule. According to the Empiricalâ Rule, if a distribution isâ bell-shaped, then approximately of the data will lie within 1 standard deviation of theâ mean; approximately 95% 99.7% 68% of the data will lie within 2 standard deviations of theâ mean; approximately 68% 95% 99.7% of the data will lie within 3 standard deviations of the mean.