IB skill practice

Calculate expected frequency

Calculate an expected cell count for a chi-square test.

Paper 1, Paper 2 5 marks Difficulty 5

Calculate expected frequency - exam scenario

Confirm the modelling meaning first. In a coastal council contingency table, the row total is 76, the column total is 63, and the grand total is 200. Calculate the expected frequency for that cell. 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.