දත්ත නිරූපණය — සා/පෙළ ගණිතය

Every day the world hands you raw numbers — election results, a family budget, the marks of a whole class — and raw numbers are hard to feel. A picture fixes that in a glance. When a newspaper wants to show how the government spends its rupees, or a shopkeeper wants to see which product sells most, they reach for a chart. In this lesson you learn to turn a table of numbers into a pie chart, to read one back, to sort data into the right kind, and to organise long lists into neat classes. These are the skills a statistician uses — and they earn you steady marks every single year at the O/L.