Question

The amount of annual rainfall is normally distributed with a mean of 20 inches and a standard deviation of 3.5 inches. a normal curve titled annual rainfall has inches on the x-axis, going from 9.5 to 30.5. vertical lines are at 13, 16.5, 20, 23.5, 27, 30.5. the highest point of the curve is at 20. about what percent of the rainfall amounts do you expect to be within 7 inches of the mean?

Answer 1

Approximately 68% of the rainfall amounts can be expected to be within 7 inches of the mean.

Step-by-step explanation:

The question is asking about the percentage of rainfall amounts that can be expected to be within 7 inches of the mean annual rainfall. In a normal distribution, approximately 68% of the data is within one standard deviation of the mean. Therefore, we can expect about 68% of the rainfall amounts to be within 7 inches of the mean.