which statement about solving inequalit
adding the same value to both sides of an inequality does not change the solution set
subtracting the same value from both sides of an inequality changes the solution set
when dividing both sides of an inequality by the same positive value, it is necessary to reverse the inequality sign
when multiplying both sides of an inequality by the same negative value, it is not necessary to reverse the inequality sign

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