The American Academy of Pediatrics recommends avitamin D
Chapter 8, Problem 75(choose chapter or problem)
The American Academy of Pediatrics recommends avitamin D level of at least 20 ng/ml for infants. Thearticle Vitamin D and Parathormone Levels of LatePretermFormula Fed Infants During the First Yearof Life (European J. of Clinical Nutr., 2012: 224230)reported that for a sample of 102 preterm infants judgedto be of appropriate weight for their gestational age, thesample mean vitamin D level at 2 weeks was 21 with asample standard deviation of 11. Does this provide convincingevidence that the population mean vitamin Dlevel for such infants exceeds 20? Test the relevanthypotheses using a significance level of .10.
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