IB skill practice

Calculate pooled proportions

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

Paper 1, Paper 2 5 marks Difficulty 5

Calculate pooled proportions - exam scenario

For a training college two-proportion test, sample counts are 37 out of 106 and 31 out of 101. Calculate the pooled proportion. Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.