Use Poisson approximation to binomial - official syllabus scenario
Read the official-HL feature being tested first. A rare-event binomial model in a library system has \(n=155\) and \(p=0.025\). Find the Poisson approximation mean. Enter the requested value and choose the interpretation that matches the result.
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Worked practice: result and interpretation
Calculate the requested result first, then choose the interpretation that follows from it.