Scenario 1: You flip a coin twice. Scenario 2: An ice cream stand serves three flavors of ice cream: Vanilla, Chocolate, and Mint with a choice of chocolate sprinkles or rainbow sprinkles. (You’ll have to redraw the tree diagram to fill it in.) PLEASE HELP IVE POSTED THIS FOR THE 7TH TIME WILL GIVE BRAINLIEST

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