Mathematics - Term 3 - Week 4

Data handling involves collecting, organizing, and interpreting data to make informed decisions. In this lesson, we will focus on how to represent data using charts and graphs, as well as how to analyze this data to draw conclusions. Understanding data handling is essential in various fields, including science, business, and everyday life.

Let's consider a simple data set: the number of pets owned by students in a class. The data is as follows: 5 students have dogs, 3 have cats, and 2 have birds. We can represent this data using a bar graph. The x-axis will represent the type of pet, while the y-axis will represent the number of students. By plotting the points, we can easily see which pet is the most popular among the students.

Now, let's work together to create a pie chart based on the following data: 10 students prefer soccer, 6 prefer basketball, and 4 prefer tennis. First, we need to find the total number of students, which is 20. Next, we will calculate the angle for each sport by using the formula: (number of students preferring the sport / total students) x 360 degrees. Let's calculate the angles together and then draw the pie chart.

For your independent practice, you will receive a data set showing the favorite fruits of 30 students. The data includes apples, bananas, oranges, and grapes. Your task is to create a bar graph to represent this data. After that, answer the following questions: Which fruit is the most popular? How many students prefer bananas? Make sure to show all your workings clearly.

• Collecting and organizing data
• Only collecting data
• Only analyzing data
• None of the above

Answer: Collecting and organizing data

Data handling involves both collecting and organizing data to make sense of it.

• A table
• A pie chart
• A list
• A paragraph

Answer: A pie chart

A pie chart visually represents data, showing proportions of a whole.

Answer: 10

To find the total, add the number of students with each type of pet: 5 + 3 + 2 = 10.

• 50%
• 66.67%
• 33.33%
• 20%

Answer: 66.67%

To find the percentage, divide 20 by 30 (total students) and multiply by 100: (20/30) x 100 = 66.67%.

Answer: Reviewing mistakes helps to understand errors and improve accuracy in future data handling.

Correcting mistakes ensures better understanding and prevents similar errors in the future.

• Bar graph
• Line graph
• Pie chart
• Histogram

Answer: Pie chart

A pie chart is specifically designed to show how different parts contribute to a whole.

Answer: Divide the number of students preferring that category by the total number of students and multiply by 360 degrees.

This formula helps to convert the proportion of students into an angle for the pie chart.