What are chen sheng and wu guang known for?

the daze village uprising
drawing the plans for the great wall
defeating the mongol invaders
inventing a tool for temple construction

Emma lives on a tight budget. she saves money and also makes intelligent choices when spending it. which statements describe emma's financial skills? select three options. emma is more prepared to meet her basic needs. emma is better prepared to avoid financial setbacks. emma is better able to avoid accumulating assets. emma is more prepared to face emergencies. emma is better able to avoid financial decision-making.

Where is sub-saharan africa located?

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.