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25/51 Marks
The pie chart shows the age distribution in a village of 120 people.
a) How many of the villagers are over 60?
25 to 60
Over 60
b) What percentage of the villagers are
under 25?
Under 25
a)
b)
over 60:
+ villagers
W

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