WAEC Further Mathematics 2025 Theory — Question 5

Model answer

Using class boundaries (subtract 0.5 from lower limits, add 0.5 to upper limits) and computing class widths and frequency densities (frequency/width): 54.5-59.5 (width 5, density 3.6); 59.5-65.5 (width 6, density 0.83); 65.5-71.5 (width 6, density 3.33); 71.5-78.5 (width 7, density 3.14); 78.5-86.5 (width 8, density 3.375); 86.5-90.5 (width 4, density 2.0). A histogram is then drawn with class boundaries on the x-axis and frequency density on the y-axis, bars drawn to these heights with no gaps between bars.