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Free response question A study of iron deficiency among infants compared samples of infants following different feeding regimens.
Free response question
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the children in another group were fed a standard baby formula without any iron supplements. Here are the results on blood hemoglobin levels at 12 months of age.
Groupn s
______________________________________________
Breast-fed2313.31.7
Formula1912.41.8
a).Is there significant evidence that the mean hemoglobin level is higher among breast-fed babies? Give appropriate statistical evidence to support your conclusion.
b) .Construct a 95% confidence interval for the mean difference in hemoglobin level between the two populations of infants. Interpret your interval in the context of this problem.
