Your analytics professor hands back the tests from the previous exam and realizes there are several exams leftover, suggesting these students have skipped his class. He believes that their absence is caused by a poor performance on the test. If the theory is correct, the leftover papers will have lower scores than those papers handed back. He records the marks of the leftover papers with the marks of the returned papers. The professor wants to know if the group of papers he returned received a higher mark than the leftover papers. What is the best test to use

the returned papers

Explanation:

The returned papers will show the correct answers because they from students who did not skipped the class.In most cases that will help with the validity of the results if the professors wants to see the deviations with the marks obtained from both parties.

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.

answer; (d) all of the above; 100%