Empirical Rule
https://davidwills.us/stat200/empirical.png

In normally distributed data

How much of the data is within 1 SD of the mean:______%
                     [____,____]
How much of the data is within 2 SDs of the mean:______%
                     [____,____]
How much of the data is within 3 SDs of the mean:______%
                     [____,____]

How much of the data is >= the mean:_____%
How much of the data is <= the mean:_____%


The area under the curve is 1.
How much area is within 1 SD of the mean:______  (not a %)
How much area is within 2 SDs of the mean:______
How much area is within 3 SDs of the mean:______


Learn the "slices"
How much between the mean and 1 SD:______
How much between the mean and -1 SD:______
How much between 1 SD and 2 SD:______
How much between -1 SD and -2 SD:______
How much between 2 SD and 3 SD:______
How much between -2 SD and -3 SD:______

How much less than -2 SD plus more than 2 SD:______