Question: A small study (n=12) compared the changes in bone density in 4 women who are breastfeeding to 8 women who are not breastfeeding. The data

A small study (n=12) compared the changes in bone density in 4 women who are breastfeeding to 8 women who are not breastfeeding. The data in each group are not normally distributed. Which test would be appropriate to test the women's mean mineral content in their spines between these two groups

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