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Statistics
| Question | Answer |
|---|---|
| Hypothesis | a statement that might be true or false, but you haven't got enough evidence to support it either way yet. It must be testable |
| Statistical enquiry cycle | Planning Collecting data Processing + presenting data Interpreting results Evaluating results |
| Statistical enquiry cycle (planning) | choose hypothesis, what data to collect and how to record/use it |
| Statistical enquiry cycle (collecting data) | choose data sources and collecting methods, identifying any constraints |
| Statistical enquiry cycle (processing + presenting data) | choose diagrams ad=nd measures, considering use of technology |
| Statistical enquiry cycle (interpreting results) | plan analysis in order to draw conclusions and make predictions |
| Statistical enquiry cycle (evaluating results) | communicating results to the target audience, may involve planning further analysis |
| Constraints | things that limit your choice of data sources and collection methods |
| Constraints (examples) | Time limits Costs - there may a budget (generally the longer an investigation the more costly) Ethical issues Confidentiality - sensitive data and anonymous Convenience - easiest way to access data |
| Proactive strategies | help mitigate issues that may arise |
| Proactive strategies examples | Pilot study, adjust investigation if unexpected outcomes or difficulties arise Data-collection method e.g. sampling method, simulation Consider questionnaire to reduce no or incomplete responses Random response for accuracy in sensitive questions |
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