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Select all of the following statements which you believe to be true. A double-blind trial avoids assessment bias. A double-blind trial always involves a placebo
- Select all of the following statements which you believe to be true.
| A double-blind trial avoids assessment bias. | ||
| A double-blind trial always involves a placebo treatment. | ||
| A positive control treatment is a one which really works. | ||
| A control treatment must involve the use of a placebo. | ||
| All clinical trials are randomized and controlled. |
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Understanding Public Opinion Polls
Authors: Jelke Bethlehem
1st Edition
1498769756, 9781498769754
