For males in a certain town, the systolic blood pressure is normally distributed with a mean of 125 and a stan

Question

For males in a certain town, the systolic blood pressure is normally distributed with a mean of 125 and a standard deviation of 9. Using the empirical rule, determine the interval of systolic blood pressures that represent the middle 68% of males.

GPT-5 mini · Answer

The empirical rule says about 68% lie within one standard deviation of the mean.  
Mean ± 1 SD = 125 ± 9 → interval: 116 to 134 mm Hg.

For males in a certain town, the systolic blood pressure is normally distributed with a mean of 125 and a standard deviation of 9. Using the empirical rule, determine the interval of systolic blood pressures that represent the middle 68% of males.

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