6. Maddy bought an old bicycle for R200. She spent R476,28 on parts and paint to renovate the bicycle. Maddy then sold it for RI 150 through her local newspaper which cost R98,95 for the advertisement a) What were Maddy's total expenses?

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