IB skill practice

Estimate the median from a cumulative frequency curve

Use a cumulative frequency curve (ogive) to estimate the median or quartiles: read across from the cumulative frequency axis to the curve, then down to the data axis.

Paper 2 1 marks Difficulty 2

Estimate from a cumulative frequency curve

The cumulative frequency curve shows 32 values. Use the curve to estimate the upper quartile (Q3).