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Q1 L1 · Test

Exit ticket · Control Group Experiments

Exit Ticket

  1. What is an experiment?
  1. Why is a control group needed?
  1. Design an experiment to see if vitamin C supplements reduce the number of times someone gets sick in the winter months. Name the independent variable, dependent variable, and control group.

Answer Key / Look-Fors: (1) A procedure where the researcher changes one variable on purpose to see its effect on another. (2) It gives a comparison so we can tell whether the treatment caused the result. (3) IV: taking vitamin C (yes/no); DV: number of illnesses in winter; control: a similar group given a placebo; strong answers mention a large sample and keeping other factors the same.