IB skill practice

Calculate pooled proportions

Pool two sample proportions for a two-proportion z test.

Paper 1, Paper 2 5 marks Difficulty 3

Calculate pooled proportions - exam scenario

Confirm the modelling meaning first. For a training college two-proportion test, sample counts are 35 out of 86 and 28 out of 81. Calculate the pooled proportion. Enter the requested value and choose the interpretation that matches the result.

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