Does beta-carotene protect against cancer

Reference no: EM133454978

Assignment:

Does beta-carotene protect against cancer?

Beta-carotene supplements have been thought to protect against cancer. However, a study published in the Journal of the National Cancer Institute suggests that this is false. The study was conducted with 39,000 women aged 45 and up. These women were randomly assigned to receive a beta-carotene supplement or a placebo, and their health was studied over their lifetime. Cancer rates for women taking the beta-carotene supplement did not differ significantly from the cancer rates of those women taking the placebo.

1. What is the independent variable?

2. What is the dependent variable?

3. Which group is the control group?

4. Which group is the treatment group?

5. What variables should be controlled (kept the same in all groups) in this experiment?

Reference no: EM133454978

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