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29
0
Statistical distributions
1,215
•
29 Jun 2025
•
Hannah
@hannah_studys1012
Probability Distributions in A-Level Mathematicsis a comprehensive guide covering... Show more
This page delves into the binomial distribution, a key topic in Statistical distributions A-level Maths Edexcel. It provides a comprehensive overview of binomial probability calculations and their applications.
The page begins by introducing the notation for binomial distribution: X ~ B, where n is the number of trials and p is the probability of success.
Definition: The binomial distribution models the number of successes in a fixed number of independent trials, each with the same probability of success.
Students are guided through calculating probabilities for specific outcomes and ranges using the binomial probability formula:
P = nCr * p^r * ^
Example: For X ~ B, the probability of exactly 2 successes is calculated using 12C2 * ^2 * ^10.
The page also covers cumulative binomial probabilities, teaching students how to find probabilities for X being less than or equal to a certain value.
Highlight: Understanding how to use calculator functions for binomial probabilities is crucial for efficiently solving Edexcel A-level maths probability distribution questions.
Practical applications of the binomial distribution are explored through real-world scenarios, such as rolling a biased die or surveying radio listeners.
Vocabulary: Cumulative binomial probability - the probability that a binomial random variable is less than or equal to a specified value.
This page focuses on more complex binomial distribution A-level Maths questions, providing students with challenging problems and detailed solutions. It builds upon the foundational knowledge from previous sections to tackle more advanced scenarios.
The content begins with a problem involving a biased die, demonstrating how to apply the binomial distribution to real-world situations. Students are asked to state assumptions and calculate specific probabilities.
Example: For a die with P = 0.3 rolled 15 times, the probability of exactly 4 sixes is calculated as 15C4 * 0.3^4 * 0.7^11 = 0.219.
The page then moves on to more complex calculations, including finding probabilities for ranges of values and using cumulative binomial probabilities.
Highlight: The importance of using technology, such as calculators with binomial distribution functions, is emphasized for solving complex problems efficiently.
Towards the end, the page presents a practical scenario involving radio listeners in a town, demonstrating how binomial distribution can be applied to real-world data analysis.
Vocabulary: Parameter estimation - the process of using sample data to estimate the parameters of a binomial distribution.
This section concludes with problems that require students to find critical values, reinforcing the practical applications of binomial distribution in statistical inference.
Example: Finding the smallest value of s such that P < 0.01 requires iterative calculations and understanding of cumulative probabilities.
This page introduces fundamental concepts of probability distributions and random variables, essential for A-level Maths Edexcel students. It covers the basics of sample spaces, probability calculations, and discrete random variables.
Definition: A random variable is a variable whose value is determined by the outcome of a random event.
The page presents examples of probability distributions, including a dice roll and a spinner experiment. It demonstrates how to calculate probabilities for specific outcomes and ranges of values.
Example: For a fair six-sided die, the probability of rolling any number is 1/6.
The content also covers more complex scenarios, such as a spinner experiment where the spinner is spun until a specific color appears or a maximum number of spins is reached. This introduces students to conditional probability concepts.
Highlight: The page emphasizes the importance of understanding how to represent probability distributions in table form, a crucial skill for A-level Maths probability distribution questions.
Towards the end, the page presents practice problems that test students' understanding of discrete uniform distributions and probability calculations for various scenarios.
Vocabulary: Discrete uniform distribution - a probability distribution where all outcomes have an equal probability of occurring.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
Google Play
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
Hannah
@hannah_studys1012
Probability Distributions in A-Level Mathematics is a comprehensive guide covering discrete random variables, binomial distributions, and probability calculations. This resource is invaluable for students studying Edexcel A-level Maths probability distribution questions.
Key points:
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page delves into the binomial distribution, a key topic in Statistical distributions A-level Maths Edexcel. It provides a comprehensive overview of binomial probability calculations and their applications.
The page begins by introducing the notation for binomial distribution: X ~ B, where n is the number of trials and p is the probability of success.
Definition: The binomial distribution models the number of successes in a fixed number of independent trials, each with the same probability of success.
Students are guided through calculating probabilities for specific outcomes and ranges using the binomial probability formula:
P = nCr * p^r * ^
Example: For X ~ B, the probability of exactly 2 successes is calculated using 12C2 * ^2 * ^10.
The page also covers cumulative binomial probabilities, teaching students how to find probabilities for X being less than or equal to a certain value.
Highlight: Understanding how to use calculator functions for binomial probabilities is crucial for efficiently solving Edexcel A-level maths probability distribution questions.
Practical applications of the binomial distribution are explored through real-world scenarios, such as rolling a biased die or surveying radio listeners.
Vocabulary: Cumulative binomial probability - the probability that a binomial random variable is less than or equal to a specified value.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page focuses on more complex binomial distribution A-level Maths questions, providing students with challenging problems and detailed solutions. It builds upon the foundational knowledge from previous sections to tackle more advanced scenarios.
The content begins with a problem involving a biased die, demonstrating how to apply the binomial distribution to real-world situations. Students are asked to state assumptions and calculate specific probabilities.
Example: For a die with P = 0.3 rolled 15 times, the probability of exactly 4 sixes is calculated as 15C4 * 0.3^4 * 0.7^11 = 0.219.
The page then moves on to more complex calculations, including finding probabilities for ranges of values and using cumulative binomial probabilities.
Highlight: The importance of using technology, such as calculators with binomial distribution functions, is emphasized for solving complex problems efficiently.
Towards the end, the page presents a practical scenario involving radio listeners in a town, demonstrating how binomial distribution can be applied to real-world data analysis.
Vocabulary: Parameter estimation - the process of using sample data to estimate the parameters of a binomial distribution.
This section concludes with problems that require students to find critical values, reinforcing the practical applications of binomial distribution in statistical inference.
Example: Finding the smallest value of s such that P < 0.01 requires iterative calculations and understanding of cumulative probabilities.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces fundamental concepts of probability distributions and random variables, essential for A-level Maths Edexcel students. It covers the basics of sample spaces, probability calculations, and discrete random variables.
Definition: A random variable is a variable whose value is determined by the outcome of a random event.
The page presents examples of probability distributions, including a dice roll and a spinner experiment. It demonstrates how to calculate probabilities for specific outcomes and ranges of values.
Example: For a fair six-sided die, the probability of rolling any number is 1/6.
The content also covers more complex scenarios, such as a spinner experiment where the spinner is spun until a specific color appears or a maximum number of spins is reached. This introduces students to conditional probability concepts.
Highlight: The page emphasizes the importance of understanding how to represent probability distributions in table form, a crucial skill for A-level Maths probability distribution questions.
Towards the end, the page presents practice problems that test students' understanding of discrete uniform distributions and probability calculations for various scenarios.
Vocabulary: Discrete uniform distribution - a probability distribution where all outcomes have an equal probability of occurring.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
Google Play
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
