Social Studies, 29.08.2019 00:50 baileysosmart
Julie works at a large gym. she wants to do a study of the effect of having a personal trainer on self-esteem and mood. she collects a list of members at her gym who would like to have a personal trainer. she assigns half of them to have a trainer right away and half of them to wait several months before being assigned a trainer. she measures self-esteem and mood in all of the participants over the next several months when only one of the groups would have a trainer. what kind of design is julie using?
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