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Unit 2 Review. 1.2 Conclusions Sample Population Causal relationship Cause and Effect Common Cause Reverse Cause and Effect Accidental Presumed Cause and Effect Extraneous Variables Control Group / Experimental Group Placebo Effect. Unit 2 Review. 2.2 Characteristics of Data Data
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Unit 2 Review 1.2 Conclusions • Sample • Population • Causal relationship • Cause and Effect • Common Cause • Reverse Cause and Effect • Accidental • Presumed Cause and Effect • Extraneous Variables • Control Group / Experimental Group • Placebo Effect
Unit 2 Review 2.2 Characteristics of Data • Data • Sample v population • Inference • Cross-sectional v longitudinal study • Time series data • Discrete / continuous data • Quantitative / qualitative variables
Unit 2 Review 2.3 Collecting Samples • Random • Sample size • Types of sampling methods • Simple random sample • Systematic random sample • Stratified random sample • Cluster random sample • Multi-stage random sample • Destructive sample
Unit 2 Review 2.4 Creating Questions • Types of Questions • Open • Closed • Information • Checklist • Ranking • Rating • Good questions are: • Simple, relevant, specific, readable • Good questions avoid: • Jargon, abbreviations, negatives, leading respondents, insensitivity • Primary v secondary data
Unit 2 Review 2.5 Avoiding Bias • Bias • Sampling bias • Non-response bias • Household bias • Response bias (Hawethorne effect)
