2. Which of the following sets of sides will NOT form a right angled triangle? a) sides 13cm, 12cm, and 5cm.
b) sides 3cm, 4cm, and 5cm.
c) sides 8cm, 6cm, and 10cm.
d) sides 15cm, 12cm, and 8cm​

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