X 25
50
175
1100
1125
150
175
у
150
(178
216
265
1323
392
1470.4
a.
Use the quadratic regression feature of a graphing calculator to find a quadratic model. Round to the nearest
thousdandths place.
y = 7.821x2 - 0.936x - 94.034
b. y=-7.821x? +0.936x - 94.034
y = 0.008x2 +0.518x + 131.886
d. y = 0.008x2 - 0.518x - 131.886
C.

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