https://ronlevygroup.cst.temple.edu/courses/2016_fall/biost5312/lectures/biostat_lecture_09.pdf
Cardinal data can be ratio scale, meaning a xed zero point is de ned, or interval scale where the zero point is arbitrary. Only with ratio scale data does comparing ratios (this is twice as large as that) make sense.
https://teaching.temple.edu/sites/teaching/files/resource/pdf/MasteringOnlineDiscussionBoardFacilitation.pdf
Introduction Discussion boards, or threaded discussions, are one of the most commonly used tools in online teaching. Discussion forums provide the ability for asynchronous discussion to occur over a period of time. The ability to learn asynchro-nously is one of the primary benefits of online learning. Students are able to reflect upon their ideas before sharing them with the class, leading to ...