Does breast-feeding weaken bones? Breast-feeding mothers secrete calcium into their milk. Some of the calcium may come from their bones, so mothers may lose bone mineral. Researchers compared a random...

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Does breast-feeding weaken bones? Breast-feeding mothers secrete calcium into their milk. Some of the calcium may come from their bones, so mothers may lose bone mineral. Researchers compared a random sample of 47 breast-feeding women with a random sample of 22 women of similar age who were neither pregnant nor lactating. They measured the percent change in the bone mineral content (BMC) of the women’s spines over three months. Comparative boxplots and summary statistics for the data from Fathom are shown below.36


(a) Based on the graph and numerical summaries, write a few sentences comparing the percent changes in BMC for the two groups.


(b) Is the mean change in BMC significantly lower for the mothers who are breast-feeding? Give appropriate evidence to justify your answer.


(c) Can we conclude that breast-feeding causes a mother’s bones to weaken? Why or why not?




Answered Same DayDec 25, 2021

Answer To: Does breast-feeding weaken bones? Breast-feeding mothers secrete calcium into their milk. Some of...

David answered on Dec 25 2021
126 Votes
a) Based on the graph and numerical summaries, write a few sentences
comparing the percent change
s in BMC for the two groups.
The graphs show more variation for breastfeeding women, ie the mineral bone
density fluctuates more. The mean is -3.58723 below while for non bf women it is
.309091. moreover the standard deviation is more for bf women, so both these
Facts suggest that the...
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