A company wants to test a new dog food that is supposed to help overweight dogs lose weight. 50 dogs are chosen to get the new food, and 50 more continue their normal diets. After one month, the dogs are checked to see if they lost any weight. The independent variable is the ____, while the dependent variable is the ____. The experimental group is the ____. The control group is the ____ 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. The independent variable is the ____, while the dependent variable is the ____. The experimental group is the ____, while the control group is the ____. A student wants to study the effect of sunlight on plant growth. In his experiment, 12 plants receive normal amounts of sunlight, and 12 plants are kept under bright sun lamps all night long. After 6 weeks, the plants’ heights are measured. The independent variable is the ____, while the dependent variable is the ____. The control group is the ____, while the experimental group is the ____.

Experimental Design

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