Jordan runs an experiment testing the effects of sugar consumption on aggression levels in children. He randomly assigns 20 subjects either to a control group given sugar-free candy or to the experimental group that was given the same candy that did contain sugar. He then tests the subjects’ response to several diff erent puzzles, each with increasing diffi culty. Jordan hypothesizes that sugar levels do play a role in aggression in children. In order to know whether his hypothesis has been supported, Jordan will need to use:

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Jordan runs an experiment testing the effects of sugar consumption on aggression levels in children. He randomly assigns 20 subjects either to a control group given sugar-free candy or to the experimental group that was given the same candy that did contain sugar. He then tests the subjects’ response to several diff erent puzzles, each with increasing diffi culty. Jordan hypothesizes that sugar levels do play a role in aggression in children. In order to know whether his hypothesis has been supported, Jordan will need to use: