Solar panels are arrays of photovoltaic cells that convert solar radiation into electricity. the table shows the annual percent change in the us price per watt of a solar panel

year 2004 2005 2006 2007 2008
% growth
over previous yr -5.7 6.7 9.7 -3.7 3.6

find the largest time interval over which the actual price per watt of a solar panel was an increasing function of time.

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