Experimental probability (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is the formula for experimental probability?
What is the formula for experimental probability?
Experimental probability = successful outcomes / total trials
Calculate experimental probability for 20 heads in 50 flips.
Calculate experimental probability for 20 heads in 50 flips.
Experimental probability = 20/50 = 0.4 or 40%
What does a result of 0.68 for coin flips suggest?
What does a result of 0.68 for coin flips suggest?
68% chance of getting heads; coin may be biased.
Expected results for a fair 4-sided spinner spun 100 times?
Expected results for a fair 4-sided spinner spun 100 times?
Each side should come up 25 times (100/4).
How to determine if a side is biased in a trial?
How to determine if a side is biased in a trial?
Compare observed frequency to expected frequency.
What indicates a spinner is biased?
What indicates a spinner is biased?
Significant difference from expected outcomes.
Why are larger sample sizes better in experiments?
Why are larger sample sizes better in experiments?
They reduce chance errors and improve accuracy.
What is a method to check for bias in experiments?
What is a method to check for bias in experiments?
Use control groups to compare results objectively.
What should you always show in exam calculations?
What should you always show in exam calculations?
Show your working and substitute numbers clearly.
What does a large difference from theoretical results indicate?
What does a large difference from theoretical results indicate?
It may suggest bias in the experiment.