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> Teacher Resources: Instructional Notes
Here is another presidential situation for our friends.
Andrew and Khalid have been learning about the presidents of the United States and their major accomplishments. The boys have also been studying different mathematical data related to the presidencies.
In their studies, they found that the ages of the presidents at inauguration formed a normal distribution with a mean of μ = 54.659 and a standard deviation of 
= 6.186.
President Clinton's Inauguration
Check Your Understanding
Khalid: OK. I get the 68-95-99.7 Rule. But those are not the only percentages along the normal curve.
Justyce: You are right! Those percentages mark the whole standard deviations from the mean. However, there are an infinite number of percentages under the curve that you can talk about.
