sto ave 12.72 (M4) The authors of the paper "Serum Zinc Levels of Cord Blood: Relation to Birth Weight and Gestational Period" (Journal of Trace Elements in Medicine and Biology [2015]: 180-183) car- ried out a study of zinc levels of low-birth-weight babies and normal-birth-weight babies. For a sample of 50 low- birth-weight babies, the sample mean zinc level was 17.00 and the standard error was 0.43. For a sample of 73 normal-birth-weight babies, the sample mean zinc level was 18.16 and the standard error was 0.32. Explain why the two standard errors are not the same.

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sto
ave
12.72 (M4)
The authors of the paper "Serum Zinc Levels of Cord Blood:
Relation to Birth Weight and Gestational Period" (Journal of
Trace Elements in Medicine and Biology [2015]: 180-183) car-
ried out a study of zinc levels of low-birth-weight babies
and normal-birth-weight babies. For a sample of 50 low-
birth-weight babies, the sample mean zinc level was 17.00
and the standard error
was 0.43. For a sample of 73
normal-birth-weight babies, the sample mean zinc level was
18.16 and the standard error was 0.32. Explain why the two
standard errors are not the same.
Transcribed Image Text:sto ave 12.72 (M4) The authors of the paper "Serum Zinc Levels of Cord Blood: Relation to Birth Weight and Gestational Period" (Journal of Trace Elements in Medicine and Biology [2015]: 180-183) car- ried out a study of zinc levels of low-birth-weight babies and normal-birth-weight babies. For a sample of 50 low- birth-weight babies, the sample mean zinc level was 17.00 and the standard error was 0.43. For a sample of 73 normal-birth-weight babies, the sample mean zinc level was 18.16 and the standard error was 0.32. Explain why the two standard errors are not the same.
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