Question E-Z pass is an electronic toll-collection system used in may US states. Suppose that 18% of vehicles that pass through an E-Z pass lane are trucks. Given that the
types of vehicles occur independently of each other, what is the probability that less than 3 of the next 8 vehicles passing through this lane are trucks?

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