Question:

In a certain distribution of numbers, the mean is 90 with a

Last updated: 7/9/2022

In a certain distribution of numbers, the mean is 90 with a

In a certain distribution of numbers, the mean is 90 with a standard deviation of 3. At least what fraction of the numbers are between 63 and 117? At least of all the numbers must lie between 63 and 117. (Type an integer or a simplified fraction.)