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Expected Frequency Flashcards
GCSE Mathematics (Edexcel) 1MA1
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Expected Frequency
The number of times an event is predicted to occur based on probability.
Formula for Expected Frequency
Expected Frequency = Probability × Number of Trials.
What does Expected Frequency represent?
It represents the predicted outcome of an event over a certain number of trials.
Key requirement for Expected Frequency
You need the probability of the event and the total number of trials.
Expected Frequency of a fair coin landing heads in 100 flips
0.5 × 100 = 50.
Expected Frequency of rolling a 6 on a fair die in 60 rolls
1/6 × 60 = 10.
What happens if the number of trials increases?
The actual frequency is likely to get closer to the expected frequency.
Difference between Expected and Actual Frequency
Expected Frequency is a prediction, while Actual Frequency is the observed result.
Expected Frequency in a biased situation
Use the given probability of the event instead of assuming fairness.
Why is Expected Frequency useful?
It helps to predict outcomes and compare them with actual results to identify patterns or biases.
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