IB skill practice

Use normal approximations to binomial models

Apply mean, standard deviation, and continuity correction for binomial approximations.

Paper 1, Paper 2 5 marks Difficulty 5

Use normal approximations to binomial models - method focus

For a solar farm binomial variable with \(n=85\) and \(p=0.41\), use a normal approximation with continuity correction to standardise \(P(X\le 39)\). Find the corrected \(z\)-value. This version asks for the same mathematical quantity after confirming the method from the context. Enter the requested value and choose the interpretation that matches the result.

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