They are bell shaped, and the mew is the highest point of the curve.
Mew and Theta
This tells if the distribution of a certain set of numbers is evenly distributed.
The Empirical Rule- The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean. The empirical rule can be broken down into three parts: 68% of data falls within the first standard deviation from the mean. 95% fall within two standard deviations. 99.7% fall within three standard deviations.