In this example your experimental group is the bag of

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group. In this example, your experimental group is the bag of popcorn you placed in the refrigerator. An experimental group is the group that receives the variable being tested in an experiment. The control group is the group in an experiment that does not receive the variable you are testing. For your experiment, the bag of popcorn that remained stored in the cabinet is the control group. The only difference in the two groups is where the popcorn is stored. This means that storing the popcorn in the refrigerator is the variable , the condition that is allowed to change. Setting Up the Experimental Group There are two important things you need to know when you are setting up an experimental group. First, you must know exactly what variable you're going to be testing. Then, you must know how you are going to measure the results from the experimental group. In order to measure the results, you must have some way of making a comparison. Comparing the results from the experimental group with the results of the control group is one way to measure the results you obtain from the experimental group. Think about how the results of the popcorn experiment were measured. You measured the amount of popcorn that popped in each bag to see which bag produced more. Let's say that the control group produced four cups of popcorn and the experimental group produced five cups of popcorn. What conclusion could you make from this information?
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