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Test: AP Statistics
1. | Which of the following experiments has the least amount of bias? |
A randomized double-blind experiment in which there are two experimental groups: Group A receiving a small dose of a particular drug and Group B receiving a large dose of a particular drug.
A survey of the number of people that watch online TV conducted using email.
A randomized double-blind experiment in which test subjects are assigned to either a placebo or a therapeutic agent that is used to improve metabolism.
A survey of how many people enjoy shopping conducted at a shopping mall.
None of these examples contain any potential bias.
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