Empirial Rule Quiz

The weight of oranges growing in an orchard is normally distributed with a mean weight of 5.5 oz. and a standard deviation of 0.5 oz. Using the empirical rule, what percentage of the oranges from the orchard weigh between 5 oz. and 6 oz.?

For males in a certain town, the systolic blood pressure is normally distributed with a mean of 120 and a standard deviation of 9. Using the empirical rule, determine the interval of systolic blood pressures that represent the middle 68% of males.

The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1000 hours and a standard deviation of 20 hours. Using the empirical rule, determine what interval of hours represents the lifespan of the middle 95% of light bulbs.

In an all boys school, the heights of the student body are normally distributed with a mean of 70 inches and a standard deviation of 5 inches. Using the empirical rule, what percentage of the boys are between 55 and 85 inches tall?

For males in a certain town, the systolic blood pressure is normally distributed with a mean of 110 and a standard deviation of 9. Using the empirical rule, what percentage of males in the town have a systolic blood pressure between 83 and 137?