Scenario 2: Researchers in the United Kingdom were interested in whether a forti

Question

Scenario 2: Researchers in the United Kingdom were interested in whether a fortified breakfast cereal consumed daily for 12 weeks would lead to significant improvement in the Vitamin D intake of adolescent girls. They were also interested in whether consuming the fortified cereal at breakfast versus supper would make any difference in Vitamin D intake. The researchers recruited adolescent girls to participate in the study. The girls were randomly assigned to consume either fortified or unfortified cereal. These groups were further subdivided based on whether the cereal was consumed in the morning as breakfast or in the evening as supper. Vitamin D intake was recorded in g for each participant. The SPSS file Cercal.sax contains the data for the study. It can be downloaded from the Blackboard folder. Identify the independent and dependent variables for this study. (3 pts.) Independent: The independent variable would be fortified or unfortified cereal. Dependent: The dependent variable would be Vitamin D intake of adolescent girts.

Explanation / Answer

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

A dependent variable is the variable being tested and measured in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variableis observed and recorded.

Hence Independent variables are fortified and unfortified cereals intake in breakfast and as supper

Dependent variable is Vitamin D intake.

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