If you want to know what proportion of scores falls between any two points under the curve, define those points by their

*z* score and figure out the relevant proportion. Depending on whether both scores fall on the same side of the mean, one of two methods will give you the correct proportion between those points:

If the

*z* scores are on the same side of the curve, look up the proportion of scores in either the "larger area" or "smaller are" column for both

*z* scores and subtract the lower value from the higher value.

If the

*z* scores fall on both sides of the mean with the mean between them, use the "Proportion of scores between the mean and

*z* column. Look up the value for both scores and add them together.