Uncontrolled experiments (Edexcel GCSE Statistics): Flashcards
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Practise the cards
9 cards from this deck
Is testing a treatment in a clinic field or natural?
Is testing a treatment in a clinic field or natural?
Field experiment
Classify: comparing accidents before and after speed limit
Classify: comparing accidents before and after speed limit
Natural experiment
How to reduce extraneous variables in a field study?
How to reduce extraneous variables in a field study?
Use control group or randomise participants
Give one extraneous variable in breakfast test
Give one extraneous variable in breakfast test
Amount of sleep before the test
Explain why field experiments are more realistic
Explain why field experiments are more realistic
They run in natural settings so behaviour stays normal
Suggest a control to reduce extraneous effects
Suggest a control to reduce extraneous effects
Use randomisation or add a matched control group
Give an extraneous variable in breakfast math study.
Give an extraneous variable in breakfast math study.
Sleep amount; it can affect test scores independently
Name explanatory and response variables in speed limit study
Name explanatory and response variables in speed limit study
Explanatory: speed limit change; Response: number of accidents
How to reduce extraneous variables in a field study?
How to reduce extraneous variables in a field study?
Use randomisation, control group or matched pairs to limit confounders