Applying the Empirical Rule: Approximately 68% of the area under the curve falls in the center of the curve between the values M - 1 6 and u + 1 6 (mean minus one sigma, mean plus one sigma) Approximately 95% of the area under the curve falls in the center of the curve between the values M - 2 6 and u + 2 6 (mean minus two sigma, mean plus two sigma) Approximately 99.7% of the area under the curve falls in the center of the curve between the values M - 3 6 and M + 3 6 (mean minus three sigma, mean plus three sigma) 1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 Approximately 95.44% of the scores will fall between and