Aclown has 54 purple balloons and 36 orange balloons. the clown arranges the balloons into groups that have the same ratio of purple balloons to orange balloons as the whole collection of balloons. how many purple balloons are in a group that has 8 orange

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect