Matching Question The Empirical rule states approximately what percentage of observations will be found within some deviation from the mean for a normal distribution. Match the percentage of observation to the range. Drag and drop application. 68% 68% drop zone empty. 95% 95% drop zone empty. 99.7% 99.7% drop zone empty. plus or minus one standard deviation. plus or minus three standard deviations plus or minus two standard deviations