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It's a prediction of how often an event occurs.
Use: Expected frequency = P(A) × number of trials.
P(A) is the probability of event A happening.
Expected frequency = 20 (P = 1/3 × 60).
You can't have fractional occurrences in reality.
Expected frequency formula may not apply correctly.
Expected frequency = 50 (0.25 × 200).
They must be between 0 and 1.
They get closer to expected frequency.
Not showing all working or miscalculating P(A).
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