Binomial Parameters
In a binomial distribution X ~ B(n, p), n is the number of independent trials and p is the probability of success in each trial, where 0 < p < 1 and n is a positive integer.
Real World
A quality control inspector at Cadbury's checks 50 chocolates per batch for defects, where historical data shows p = 0.03, giving X ~ B(50, 0.03) for defect counts.
Exam Focus
Identify n and p from context before writing the distribution; confusing n and p reverses the skew and loses method marks.
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