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0
Olamide
08/12/2025
Maths
Year 7 Module 11 : Data MATH
368
•
8 Dec 2025
•
Understanding Data in Year 7 Math Module 11
Olamide
@olamide_26
1 / 5
Data Collection and Basic Charts
Ever wondered how surveys actually work? Frequency tables are your starting point - they simply count how many times each value appears in your data. Think of it like counting votes for your favourite pizza topping.
Bar charts are brilliant for comparing different categories. The key rules are dead simple: same width bars, gaps between them, and always label your axes. Your data goes on the x-axis, and how often it occurs goes on the y-axis.
You'll also see compound bar charts (data stacked like building blocks) and comparative bar charts (data standing side by side like friends in a photo). Pie charts show how your data breaks into slices of a whole - just divide 360° by your total to work out each slice's angle.
Quick tip: For pie charts, if you have 30 people surveyed, each person equals 12° (360 ÷ 30). Easy!
Understanding Different Types of Data
Not all data is created equal, and knowing the difference will save you loads of confusion. Qualitative data describes things (like hair colour or favourite subject), while quantitative data deals with numbers you can actually measure.
Here's where it gets interesting: discrete data can only take specific values . Continuous data can be any value within a range (like your height, which could be 165.3cm or 165.34cm).
Primary data is what you collect yourself for your own research project. Secondary data is information someone else gathered that you're now using. Think of primary data as cooking from scratch, and secondary data as using a ready-made sauce.
Pictograms use symbols to represent data values - they're like emoji for statistics! Just remember to include a clear key showing what each symbol represents.
Remember: Grouped data bundles information into categories, making large datasets much easier to handle and analyse.
Averages and Statistical Measures
The mean is what most people call the average - add everything up and divide by how many values you have. For grouped data, you'll need to use midpoints and multiply by frequencies, but don't worry, it's just an extra step.
The median is your middle value when everything's in order. If you have an even number of values, take the average of the two middle ones. For tables, use the formula /2 to find which position holds your median.
The mode is simply the most common value - the one that appears most often. You might have more than one mode or no mode at all. The range shows how spread out your data is by subtracting the smallest from the largest value.
Line graphs connect dots with straight lines to show how data changes over time. They're perfect for tracking trends like temperature changes or your exam scores throughout the year.
Pro tip: Smaller ranges mean more consistent data - think of it as measuring how reliable or predictable your information is.
Advanced Data Analysis Tools
Two-way tables organise data using two different categories, like gender and handedness. Fill them out step by step, making sure all your rows and columns add up correctly - it's like solving a number puzzle.
Box plots show five key values: minimum, lower quartile, median, upper quartile, and maximum. They're brilliant for comparing different datasets at a glance. When comparing box plots, always mention both the average (using medians) and the spread (using range or IQR).
Correlation means two things are connected somehow. Positive correlation means both increase together (like study time and test scores). Negative correlation means one goes up while the other goes down (like temperature and heating bills).
Causality is when one thing actually influences another. Just because two things correlate doesn't mean one causes the other - ice cream sales and drownings both increase in summer, but ice cream doesn't cause drowning!
Key insight: Strong correlation means the connection is clear and obvious, while weak correlation means there's a connection but it's not very reliable.
Scatter Graphs and Data Patterns
Scatter graphs plot two variables against each other to spot patterns and relationships. They're like detective tools for data - you're looking for clues about how two things might be connected.
The line of best fit is a straight line that best represents your scattered data points. It helps you make predictions and see the overall trend, even when individual points are all over the place.
Outliers are the rebels of data - values that don't fit with the rest. They stick out like a sore thumb and can sometimes reveal interesting stories or errors in data collection.
Frequency polygons work brilliantly for continuous data that's been grouped. You plot the midpoint of each group against its frequency, then join the dots. They're especially useful when you're dealing with large amounts of data that would be messy in other chart types.
Important: When you see "no correlation", it means there's no clear linear relationship between the variables - they're basically doing their own thing independently.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Understanding Data in Year 7 Math Module 11
Olamide
@olamide_26
Data handling is everywhere in your daily life - from social media stats to sports scores to opinion polls. This module covers all the essential skills you'll need to collect, organise, and make sense of information using charts, graphs, and... Show more
Data Collection and Basic Charts
Ever wondered how surveys actually work? Frequency tables are your starting point - they simply count how many times each value appears in your data. Think of it like counting votes for your favourite pizza topping.
Bar charts are brilliant for comparing different categories. The key rules are dead simple: same width bars, gaps between them, and always label your axes. Your data goes on the x-axis, and how often it occurs goes on the y-axis.
You'll also see compound bar charts (data stacked like building blocks) and comparative bar charts (data standing side by side like friends in a photo). Pie charts show how your data breaks into slices of a whole - just divide 360° by your total to work out each slice's angle.
Quick tip: For pie charts, if you have 30 people surveyed, each person equals 12° (360 ÷ 30). Easy!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Understanding Different Types of Data
Not all data is created equal, and knowing the difference will save you loads of confusion. Qualitative data describes things (like hair colour or favourite subject), while quantitative data deals with numbers you can actually measure.
Here's where it gets interesting: discrete data can only take specific values . Continuous data can be any value within a range (like your height, which could be 165.3cm or 165.34cm).
Primary data is what you collect yourself for your own research project. Secondary data is information someone else gathered that you're now using. Think of primary data as cooking from scratch, and secondary data as using a ready-made sauce.
Pictograms use symbols to represent data values - they're like emoji for statistics! Just remember to include a clear key showing what each symbol represents.
Remember: Grouped data bundles information into categories, making large datasets much easier to handle and analyse.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Averages and Statistical Measures
The mean is what most people call the average - add everything up and divide by how many values you have. For grouped data, you'll need to use midpoints and multiply by frequencies, but don't worry, it's just an extra step.
The median is your middle value when everything's in order. If you have an even number of values, take the average of the two middle ones. For tables, use the formula /2 to find which position holds your median.
The mode is simply the most common value - the one that appears most often. You might have more than one mode or no mode at all. The range shows how spread out your data is by subtracting the smallest from the largest value.
Line graphs connect dots with straight lines to show how data changes over time. They're perfect for tracking trends like temperature changes or your exam scores throughout the year.
Pro tip: Smaller ranges mean more consistent data - think of it as measuring how reliable or predictable your information is.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Advanced Data Analysis Tools
Two-way tables organise data using two different categories, like gender and handedness. Fill them out step by step, making sure all your rows and columns add up correctly - it's like solving a number puzzle.
Box plots show five key values: minimum, lower quartile, median, upper quartile, and maximum. They're brilliant for comparing different datasets at a glance. When comparing box plots, always mention both the average (using medians) and the spread (using range or IQR).
Correlation means two things are connected somehow. Positive correlation means both increase together (like study time and test scores). Negative correlation means one goes up while the other goes down (like temperature and heating bills).
Causality is when one thing actually influences another. Just because two things correlate doesn't mean one causes the other - ice cream sales and drownings both increase in summer, but ice cream doesn't cause drowning!
Key insight: Strong correlation means the connection is clear and obvious, while weak correlation means there's a connection but it's not very reliable.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Scatter Graphs and Data Patterns
Scatter graphs plot two variables against each other to spot patterns and relationships. They're like detective tools for data - you're looking for clues about how two things might be connected.
The line of best fit is a straight line that best represents your scattered data points. It helps you make predictions and see the overall trend, even when individual points are all over the place.
Outliers are the rebels of data - values that don't fit with the rest. They stick out like a sore thumb and can sometimes reveal interesting stories or errors in data collection.
Frequency polygons work brilliantly for continuous data that's been grouped. You plot the midpoint of each group against its frequency, then join the dots. They're especially useful when you're dealing with large amounts of data that would be messy in other chart types.
Important: When you see "no correlation", it means there's no clear linear relationship between the variables - they're basically doing their own thing independently.
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user