Identify the control group the experimental group the independent variable and the dependent variable. A new sunscreen has been developed that is supposed to be more effective at preventing sunburn. 30 participants spray one arm with the new formula, and spray the other arm with the leading formula. After 4 hours in the sun, their skin is evaluated for any redness.
Added by Christopher A.
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The independent variable is the factor that is changed or manipulated in an experiment to assess its effects. In this case, the independent variable is the type of sunscreen used on the participants' arms (the new formula vs. the leading formula). Show more…
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