1.4 Experimental Design and Ethics
Treatments, control groups, placebos, blinding and randomization, plus the reporting lapses that make published data untrustworthy.
Introductory Business Statistics 2e, 1.4 Experimental Design and Ethics
2 exercises
1.4 Exercise 1
The Smell & Taste Treatment and Research Foundation conducted a study to investigate whether smell can affect learning. Subjects completed mazes multiple times while wearing masks. They completed the pencil and paper mazes three times wearing floral-scented masks, and three times with unscented masks. Participants were assigned at random to wear the floral mask during the first three trials or dur…
1.4 Exercise 2
The Placebo Research Group conducted a study to find the extent of placebo effects. A group of people randomly selected were asked to take a test before and after taking a pill that induces a mild headache. The pill in half of the randomly selected people was replaced with a similar pill that has no effect. For each trial, researchers recorded the change in time people took to complete the tests b…
Adapted from Introductory Business Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Business Statistics 2e. Imported at revision 50ec917.