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Qualitative/Quantitative and Observation/Inference Mrs. Berbeco 9/22/10 1. Carefully study the picture in “At the Scene of the Crime: Part 1” for 3 minutes. Do not look at the back of the page. 2. Take 3 minutes to answer as many of the questions, 1-21, as you can on a separate sheet of paper. 3. Copy the following definitions on your separate sheet of paper: Qualitative - a descriptive, nonnumeric observation or piece of data Quantitative - a numerical observation or piece of data, should be accompanied by unit of measurement Observation - something directly seen or experienced Inference - a conclusion drawn about a situation that is not directly observed 4. For each of the 21 responses from “At the Scene of the Crime,” identify whether it is qualitative (L) or quantitative (N) and whether it is an observation (O) or an inference (I) by writing the two appropriate letters next to each response. 5. Ideally, have someone do 1-4 independently of you and discuss your responses, spending more time on areas of disagreement. Qual/quant is almost always clear-cut one or the other; sometimes observation/inference can be successfully argued either way depending on how you see what you see. The important part is to substantiate your responses. 6. Return to the “Observation/Inference” worksheet you completed after our Variables quiz (I may have it if you are/were absent) and, using your new knowledge of the definitions of these terms, change any answers you think should be changed. Discuss any that you find ambiguous (unclear) with a classmate or ask the teacher.
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