A researcher wanted to test the effectiveness of different levels of sunscreen on time it takes to get a sunburn. The
researcher plans find participants age 20 - 30 that all have moderate risk for sunburns. One group will wear SPF 30,
another group will wear SPF 50, and the third group will not wear sunscreen. The participants will be outside for 3 hours of
sun exposure. He will record the time it takes for sunburn to set in (if any occurs) and the severity.
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