<prompt> The area under a normal distribution curve for SD of 2 is65759599  <response>: C 95 Normal distribution: In a normal curve the area between one standard deviation on either side of the mean x1s will include approximately 68 of the values in the distribution Area between two standard deviations on either side of the mean x 2s will cover most of the values i.e., approximately 95 of the values, and Area between x 3s will include 99.7 of the values. 