Year 2 Maths Statistics & Probability

Data and Graphs

We collect data (information) and organise it into graphs so we can read and compare it easily.

Data is information we gather. We can collect data by:

Each symbol or picture represents a number. Always check the key! If one 🍎 = 2 apples, then 3 pictures = 6 apples.

Bars show how many in each group. The taller the bar, the more there are. Great for comparing amounts side by side.

Our Favourite Fruits

A class survey of 20 students. Each 🍎 = 1 student.

Apple

🍎🍎🍎🍎🍎🍎🍎

Banana

🍌🍌🍌🍌🍌

Mango

🥭🥭🥭🥭🥭🥭🥭🥭

The most popular fruit is mango (8 students). The least popular is banana (5 students). The difference between mango and banana is 3.

data — information that is collected and recorded

tally — marks used to count in groups of five (𝌐𝌐 = 10)

picture graph — a graph using pictures or symbols to show data

column graph — a graph using vertical bars to compare data

✓Data is information we collect. We can use tally marks to keep count as we gather data.
✓Picture graphs use symbols to show data. Always read the key to know what each symbol means.
✓Column graphs use bars to compare amounts. Taller bar = more.
✓Every graph needs a title, labels, and a scale so readers can understand the information.