Hemoglobin in Women Hemoglobin levels in adult females are normally distributed with a mean of 13.0 g>dL and a standard deviation of 1.3 g>dL (based on data from the National Health and Nutrition Examination Survey).

a. The normal hemoglobin range for women is 12.1 g>dL to 15.1 g>dL. What percentage of women have hemoglobin levels in the normal range?

b. If we randomly collect samples of women with 9 in each sample, what percentage of those samples have a mean hemoglobin level that is within the normal range?