과천외고 2학년 영어 독해: 함께 변했다는 사실만으로 원인이라고 말할 수 있을까요? 실전문제

Employees at a publishing company who used standing desks reported less back discomfort than employees who remained seated. The company initially credited the desks. However, workers had chosen their own desks, and those choosing standing models also tended to take regular walking breaks. A researcher proposed randomly assigning interested employees to two desk types while giving both groups the same break schedule. Participation would remain voluntary, so the resulting sample would not represent every employee. Nevertheless, random assignment within that sample would reduce the chance that preexisting preferences explained the difference between groups. The researcher also planned to measure discomfort before and after the trial. The study could then compare changes rather than mistaking different starting points for effects of the furniture.

Employees at a publishing company who used standing desks reported less back discomfort than employees who remained seated. The company initially credited the desks. However, workers had chosen their own desks, and those choosing standing models also tended to take regular walking breaks. A researcher proposed randomly assigning interested employees to two desk types while giving both groups the same break schedule. Participation would remain voluntary, so the resulting sample would not represent every employee. Nevertheless, random assignment within that sample would reduce the chance that preexisting preferences explained the difference between groups. The researcher also planned to measure discomfort before and after the trial. The study could then compare changes rather than mistaking different starting points for effects of the furniture.

Employees at a publishing company who used standing desks reported less back discomfort than employees who remained seated. The company initially credited the desks. However, workers had chosen their own desks, and those choosing standing models also tended to take regular walking breaks. A researcher proposed randomly assigning interested employees to two desk types while giving both groups the same break schedule. Participation would remain voluntary, so the resulting sample would not represent every employee. Nevertheless, random assignment within that sample would reduce the chance that __________. The researcher also planned to measure discomfort before and after the trial. The study could then compare changes rather than mistaking different starting points for effects of the furniture.

Employees at a publishing company who used standing desks reported less back discomfort than employees who remained seated. The company initially credited the desks. However, workers had chosen their own desks, and those choosing standing models also tended to take regular walking breaks. A researcher proposed randomly assigning interested employees to two desk types while giving both groups the same break schedule. Participation would remain voluntary, so the resulting sample would not represent every employee. Nevertheless, random assignment within that sample would reduce the chance that preexisting preferences explained the difference between groups. The researcher also planned to measure discomfort before and after the trial. The study could then compare changes rather than mistaking different starting points for effects of the furniture.

Employees at a publishing company who used standing desks reported less back discomfort than employees who remained seated. The company initially credited the desks. However, workers had chosen their own desks, and those choosing standing models also tended to take regular walking breaks. A researcher proposed randomly assigning interested employees to two desk types while giving both groups the same break schedule. Participation would remain voluntary, so the resulting sample would not represent every employee. Nevertheless, random assignment within that sample would reduce the chance that preexisting preferences explained the difference between groups. The researcher also planned to measure discomfort before and after the trial. The study could then compare changes rather than mistaking different starting points for effects of the furniture.