Statistics+Chapter+2

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Review Answers: 1. In a single blind study, either the experimenter or the subject knows the treatment. In a double blind, neither knows the treatment. 2. Replication, Blocking, Direct Control, and Randomization 3. Replication 4. Direct Control 5. Cannot determine cause and effect. 6. Experiment 7. Selection - exclusion of some part of the population Nonresponse - part of the selected group chooses not to respond Measurement or Response - error in the measuring instrument, values differ from true value 8. placebo 9. confounding variable 10. cannot 11. number of days missed is the explanatory variable, class rank is the response variable 12. stratified 13. Understand the Nature of the Problem Decide What to Measure and How to Measure It Collect the Data Summarize the Data & Perform a Preliminary Analysis Do the Formal Data Analysis Interpret the Results 14. All of them 15. Treatment is the method and the response is the test score.