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GCSE Mathematics · key term
One repetition of a probability experiment, such as one roll of a die.
Used by AQA and OCR
Specification P1, P3 · Paper 1, Paper 2, Paper 3
One performance of a probability experiment, such as one spin of a spinner.
Revise: Probability ExperimentsOne spin of a spinner is a trial; the colour it lands on is its outcome. Repeating the trial produces results that you can record with tally marks, then count. The count for each outcome is its frequency.
Check that the frequencies in a table add to the total number of trials, and that the branches leaving each point of a frequency tree add to the number entering it.
Divide the number of times the event occurred by the total number of trials, not by the number of different outcomes.
A larger number of trials generally gives a more reliable estimate, but the relative frequency need not get closer to the theoretical probability after every additional trial.
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Specification 11.01b, 11.01c · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
One repeat of a random experiment, such as one spin of a spinner.
Revise: Relative FrequencyEach spin is a trial, and its colour is the outcome. A tally can help you keep track as you spin; afterwards, count the tally marks to make a frequency table. These results are illustrative, not observations from a real experiment.
One repetition of an experiment, such as one roll of a die.