Mathematics, 20.07.2019 13:00 natalie2sheffield
Researchers randomly choose two groups from 15 volunteers. over a period of 9 weeks, one group watches television before going to sleep, and the other does not. volunteers wear monitoring devices while sleeping, and researchers record dream activity. which type of study method is described in each situation? a. not enough information given b. survey c. observational study d. controlled experiment
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Researchers randomly choose two groups from 15 volunteers. over a period of 9 weeks, one group watch...
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