Phil wants to find if the intake of calcium has an effect on the growth rate of children between the age of ten to fifteen.So he forms two groups and gives different amounts of calcium to each group and then measures growth rate after 15 years.In this case,calcium is the:

Question

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In this experiment, Phil is manipulating the intake of calcium, which is the independent variable. The growth rate of children is the dependent variable, as it is being measured to see if there is any effect from the independent variable.

Phil Wants to Find If the Intake of Calcium Has