Hypothesis Testing

Hypothesis Testing
In a study of iron deficiency among infants, the blood hemoglobin levels were compared between two samples of infants, who follow different feeding regimes. One group consisted of breast fed infants, while the other group was fed with a standard baby formula without any iron supplements. The summary of results on blood hemoglobin levels for infants at 12 months of age is as follows:

Group Sample size Mean Standard deviation
Breast –fed 23 13.3 1.7
Baby formula 19 12.4 1.8
Is there sufficient evidence to indicate that the mean blood hemoglobin level is higher among the breast-fed babies? Test at  = 0.05.
[sp2 = 3.0475; t = 1.663; Do not reject H0]