Investigators interested in studying serum vitamin D levels and various birth ou

Question

Investigators interested in studying serum vitamin D levels and various birth outcomes recruited 845 urban, pregnant mothers to participate in a study. Mothers were followed until they gave birth and the weight of child at birth was recorded in pounds and ounces. These data were compared among mothers grouped by low, adequate, and high vitamin D levels based on a survey that they had taken in the month prior to delivery.

Which would be the most appropriate statistical test for the relationship at hand?

ANOVA

T-test

Regression

Chi-squared test

Explanation / Answer

We have sample size as 845 urban pregnant mothers.

Investigators want to check various birth outcome i.e weight of child by studying Serum vitam D levels i.e low, adequate and high.

Thus we have weight of child as dependent variable on vitamin D levels of mother.

So dependent variable as - Weight. and Independent variable as Serum Vitamin D with three levels.

Mothers where followed till month prior of delivery. So the the data considered for vitamin D level is month prior the delivery and that data is grouped in three levels i.e low medium and high.

So as dependent variable does not have levels and only one independent variable has 3 levels we will use ANOVA statistical test for the relationship .

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