Quick reminder - Stratified sampling GCSE maths
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@3minutemaths
Visit @3minutemaths for a full range of quick reminder and GCSE maths walkthrough videos.
Visit http://www.3minutemaths.co.uk for quick reminder High School GCSE mathematics videos - or subscribe to the channel. You can download the questions from http://www.3minutemaths.co.uk - along with many others aiming to offer quick reminders of the key topics.
This video deals with sampling GCSE maths - commonly called stratified sampling. The questions are calculator paper and aimed at around grade 5 ... although they are fairly straightforward, once you get the idea:
1. The table shows the number of students in each year group at school.
Year Group 7 8 9 10 11
Number of students 220 182 161 170 158
Joe is carrying out a survey and uses a stratified sample of 90 students. Calculate the number of Year 9 students in Joe’s sample.
2. In a school 277 students each study one of three subjects.
Maths English Science
Male 32 49 27
Female 41 56 72
A sample, stratified by language studied and by gender, of 60 of the 277 students is taken. Calculate the number of female students studying English in the sample.
3. At a hospital 746 patients had the same operation. The table shows the age and gender of the patients.
Age under 18 Age 18 – 65 Age over 65
Male 84 342 50
Female 39 194 37
The hospital wants to take a stratified sample of 80 patients. Complete the table to show how many people from each group should be sampled.
Age under 18 Age 18 – 65 Age over 65
Male
Female
I hope the video helps and please do leave a comment - thanks!
My new course ‘How to good at mathematics - and great at fractions! is now live on Udemy: https://www.udemy.com/how-you-can-be-...
or click here for a limited 50% discount!:
http://www.udemy.com/how-you-can-be-g...
The course contains around 3 hours of video, quizzes and a copy of my book 'How to get an A in maths.' All the way through to GCSE and just in time for revision.
Subscribe to Simon Deacon maths for more great math videos http://www.youtube.com/subscription_c...
Visit playlists to help you get more from your studies
3 minute quick reminder math - get extra exam credit 3 minute quick reminder maths - get e...
GCSE - everything you need to know to get great grades
GCSE Higher Level - everything you ne...
How to solve linear equations
How to solve linear equations
.. and many more.
‘How to get an A in maths’ is now available on Amazon and packed full of hints, tips and techniques to help you get the very best from your studies. Or, first chapter FREE on my website http://www.3minutemaths.co.uk - real maths, tips and techniques.
http://www.3minutemaths.co.uk is full GCSE past papers, questions by topic and hints and tips to help you get the very best from your studies.
@3minutemaths
Visit @3minutemaths for a full range of quick reminder and GCSE maths walkthrough videos.
Visit http://www.3minutemaths.co.uk for quick reminder High School GCSE mathematics videos - or subscribe to the channel. You can download the questions from http://www.3minutemaths.co.uk - along with many others aiming to offer quick reminders of the key topics.
This video deals with sampling GCSE maths - commonly called stratified sampling. The questions are calculator paper and aimed at around grade 5 ... although they are fairly straightforward, once you get the idea:
1. The table shows the number of students in each year group at school.
Year Group 7 8 9 10 11
Number of students 220 182 161 170 158
Joe is carrying out a survey and uses a stratified sample of 90 students. Calculate the number of Year 9 students in Joe’s sample.
2. In a school 277 students each study one of three subjects.
Maths English Science
Male 32 49 27
Female 41 56 72
A sample, stratified by language studied and by gender, of 60 of the 277 students is taken. Calculate the number of female students studying English in the sample.
3. At a hospital 746 patients had the same operation. The table shows the age and gender of the patients.
Age under 18 Age 18 – 65 Age over 65
Male 84 342 50
Female 39 194 37
The hospital wants to take a stratified sample of 80 patients. Complete the table to show how many people from each group should be sampled.
Age under 18 Age 18 – 65 Age over 65
Male
Female
I hope the video helps and please do leave a comment - thanks!
My new course ‘How to good at mathematics - and great at fractions! is now live on Udemy: https://www.udemy.com/how-you-can-be-...
or click here for a limited 50% discount!:
http://www.udemy.com/how-you-can-be-g...
The course contains around 3 hours of video, quizzes and a copy of my book 'How to get an A in maths.' All the way through to GCSE and just in time for revision.
Subscribe to Simon Deacon maths for more great math videos http://www.youtube.com/subscription_c...
Visit playlists to help you get more from your studies
3 minute quick reminder math - get extra exam credit 3 minute quick reminder maths - get e...
GCSE - everything you need to know to get great grades
GCSE Higher Level - everything you ne...
How to solve linear equations
How to solve linear equations
.. and many more.
‘How to get an A in maths’ is now available on Amazon and packed full of hints, tips and techniques to help you get the very best from your studies. Or, first chapter FREE on my website http://www.3minutemaths.co.uk - real maths, tips and techniques.
http://www.3minutemaths.co.uk is full GCSE past papers, questions by topic and hints and tips to help you get the very best from your studies.
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