Frequency charts
key notes:
1️⃣ What is a Frequency Chart?
- A frequency chart shows how often something happens.
- It helps us organize data clearly.
- Example: How many students like 🍎 apples, 🍌 bananas, or 🍇 grapes.
2️⃣ Parts of a Frequency Chart
- Items/ Categories 🏷️ – What you are counting (fruits, colors, toys).
- Frequency 🔢 – How many times each item appears.
- Total ➕ – Sum of all frequencies.
3️⃣ How to Make a Frequency Chart
- Collect Data 📝 – Ask a question and record answers.
- List Categories 📋 – Write down all possible options.
- Count Frequencies 🔍 – How many times each option appears.
- Fill the Chart 🖊️ – Put numbers in the frequency column.
- Check Total ✅ – Add all frequencies to make sure it matches the total number of responses.
4️⃣ Why Use a Frequency Chart?
- 📌 Easy to read – Shows info clearly.
- 📌 Quick comparison – See which option is most or least popular.
- 📌 Makes graphing easier – Helps in drawing bar graphs or pictographs.
5️⃣ Example
| Fruit 🍎 | Frequency 🔢 |
|---|---|
| Apple | 5 |
| Banana | 3 |
| Grapes | 7 |
| Orange | 2 |
- Most liked fruit: 🍇 Grapes (7 votes)
- Least liked fruit: 🍊 Orange (2 votes)
6️⃣ Tips ✨
- Always label your chart.
- Use neat numbers so it’s easy to read.
- Double-check your total frequency.
Learn with an example
1) Several children compared how many thank-you notes they had written during the previous month.
| Writing thank-you notes | |
| Thank-you notes written | Frequency |
| 0 | 7 |
| 1 | 15 |
| 2 | 14 |
| 3 | 9 |
| 4 | 3 |
How many children wrote at least 1 thank-you note?____
- Find the rows for 1, 2, 3, and 4 thank-you notes. Add the frequencies for these rows.
- Add: 15 + 14 + 9 + 3 = 41
- 41 children wrote at least 1 thank-you note.
2) The primary school art teacher wrote down how many flower pots each child painted last week.
| Painting flower pots | |
| Flower pots painted | Frequency |
| 0 | 16 |
| 1 | 9 |
| 2 | 7 |
| 3 | 20 |
How many children painted exactly 1 flower pot?____
- Find the row for 1 flower pot and read the frequency. The frequency is 9.
- 9 children painted exactly 1 flower pot.
3) Students at Georgetown Secondary School wrote and submitted poems for a district-wide writing contest.
| Writing poems | |
| Poems written | Frequency |
| 1 | 3 |
| 2 | 9 |
| 3 | 16 |
| 4 | 7 |
| 5 | 4 |
How many students wrote fewer than 4 poems?______
- Find the rows for 1, 2, and 3 poems. Add the frequencies for these rows.
- Add: 3 + 9 + 16 = 28
- 28 students wrote fewer than 4 poems.
Let’s practice!🖊️
