For males in a certain town, the systolic blood pressure is normally distributed with a mean of 120 and a standard deviation of 10 Using the empirical rule, determine the interval of systolic blood pressures that represent the middle 68of males.
The middle 68% of males would fall within one standard deviation of the mean on either side.
So, the interval of systolic blood pressures that represent the middle 68% of males would be:
(120 - 10, 120 + 10)
or
(110, 130)