4 64 The risk of developing iron deciency is especially high during pregnancy Detecting such a deciency is complicated by the fact that some methods for determining iron status can be affected by the state of pregnancy itself Consider the following data on transferrin receptor concentration for a sample of women with laboratory evidence of overt iron deciency anemia (Serum Transferrin Receptor for the Detection of Iron Deficiency in Pregnancy, American Journal of Clinical Nutrition 1991 10771081) 15 2 9 3 7 6 11 9 10 4 9 7 20 4 9 4 11 5 16 2 9 4 8 3 a Compute the values of the sample mean and median Why are these values different here b Which of the mean and the median do you regard as more representative of the sample, and why

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Question: 4.64 The risk of developing iron deciency is especially high during pregnancy. Detecting such a deciency is complicated by the fact that some methods

4.64 ● The risk of developing iron deﬁciency is especially high during pregnancy. Detecting such a deﬁciency is complicated by the fact that some methods for determining iron status can be affected by the state of pregnancy itself. Consider the following data on transferrin receptor concentration for a sample of women with laboratory evidence of overt iron-deﬁciency anemia (“Serum Transferrin Receptor for the Detection of Iron Deficiency in Pregnancy,” American Journal of Clinical Nutrition [1991]: 1077–1081):

15.2 9.3 7.6 11.9 10.4 9.7 20.4 9.4 11.5 16.2 9.4 8.3

a. Compute the values of the sample mean and median. Why are these values different here?

b. Which of the mean and the median do you regard as more representative of the sample, and why?

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