Develop your understanding of proportions as applied to the normal distribution.
Guesstimate the shaded proportion in the middle of the normal distribution.

Remember the Empirical Rule (as applied to proportions), which states that .68 of the population is within one standard deviation of the mean, .95 of the population is within two standard deviations of the mean, and .997 of the population is within three standard deviations of the mean.

View this and more games at www.P2L.io