Control groups and matched pair tests (Edexcel GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is a control group in experiments?
What is a control group in experiments?
A group receiving no treatment or a placebo for comparison.
Why is blinding important in control group experiments?
Why is blinding important in control group experiments?
Prevents bias by keeping participants unaware of their group.
How do matched pair tests control extraneous variables?
How do matched pair tests control extraneous variables?
By pairing similar individuals, only treatment differs.
Difference between control group and matched pair tests?
Difference between control group and matched pair tests?
Control uses random groups; matched pairs pair similar individuals.
Example of control group in arthritis medication test?
Example of control group in arthritis medication test?
One group gets medication; control gets placebo.
What is a key disadvantage of matched pair tests?
What is a key disadvantage of matched pair tests?
They are time-consuming and hard to set up.
Example of extraneous variable in a garden fertiliser test?
Example of extraneous variable in a garden fertiliser test?
Soil quality, sunlight, or weather conditions.
What is the main goal of both control groups and matched pairs?
What is the main goal of both control groups and matched pairs?
To isolate the treatment effect by controlling other factors.
Advantage of matched pair tests?
Advantage of matched pair tests?
Excellent control over individual differences.
Create matched pairs for fertiliser test (gardener)
Create matched pairs for fertiliser test (gardener)
Pair bushes by location and size; one gets fertiliser, one not.