Absolute Frequency and Relative Frequency
Learn how absolute and relative frequency work and how to use their formulas to interpret charts. Let's get started! 🚀
Video Lesson
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Flashcards
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🛎️ What Is Absolute Frequency?
- It tells you the exact number of times something happens
- Adding all absolute frequencies gives the total number of data values
🛎️ What Is Relative Frequency?
- It tells you how big each category is, as a fraction or percentage
- Adding all relative frequencies gives 1, or 100%
🛎️ How to Calculate Absolute and Relative Frequency?
- Relative frequency = absolute frequency of the category ÷ total number
- Absolute frequency = relative frequency of the category × total number
Practice Questions
Test your understanding
The frequency table below shows the grades achieved by 25 students. If the total number of students is 25, how many students obtained the grade Satisfactory?
Correct! 🎉 +10 pointsNot quite right
To find the missing absolute frequency, subtract the other values from the total: .
The table below shows the results of a survey of favourite activities among 50 students. How many students chose Sports as their favorite activity?
Correct! 🎉 +10 pointsNot quite right
Multiply the relative frequency (40%) by the total count (50): .
Below is the transport data for Class M. If there are 80 students in Class M, how many more students take the bus compared to cycling?
Correct! 🎉 +20 pointsNot quite right
Calculate the absolute frequencies for both. For the bus: . For cycling: . Subtract: .
The table below shows the methods of payment used by customers at a supermarket on a day. How many degrees of a pie chart correspond to customers who paid with cash?
Correct! 🎉 +20 pointsNot quite right
Divide the absolute frequency of customers who paid with cash (50) by the total count (150): . Then multiply by : .
The table below shows the results of a survey on students’ favorite fruits among 60 students in Class Q. What is the relative frequency of students who prefer bananas, and how many degrees of a pie chart does this represent?
Correct! 🎉 +20 pointsNot quite right
Divide the absolute frequency of students who prefer bananas (12) by the total number of students (60): , which equals 20%. Multiply by for the pie chart: .
The pie chart below represents the favorite drinks of 90 students. How many students prefer Milk? How many degrees of the pie chart correspond to it?
Correct! 🎉 +30 pointsNot quite right
Multiply the relative frequency (20%) by the total students: . To find the corresponding angle, multiply by : .
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Interactive Activity
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