Record the death rate from heart disease per 100,000 people in a group of developed countries. The distribution is roughly described by this Normal curve: From the Normal curve, we see that the standard deviation of the heart disease rate per 100,000 people is about

Question

Record the death rate from heart disease per 100,000 people in a group of developed countries. The distribution is roughly described by this Normal curve:  From the Normal curve, we see that the standard deviation of the heart disease rate per 100,000 people is about

Quizplus · Accepted Answer

The standard deviation can be estimated by looking at the spread of the Normal curve. From the graph, we can see that the curve covers an area of approximately 68% from the mean to one standard deviation above and below the mean. The difference between the mean and the point where the curve intersects the x-axis is about 30, which corresponds to one standard deviation. Therefore, the standard deviation is approximately 30, which is closest to option B) 65.

Record the Death Rate from Heart Disease Per 100,000 People