Subjects
Careers
Maths
Biology
Chemistry
English Lang.
History
Homeostasis and response
Energy transfers (a2 only)
Infection and response
Responding to change (a2 only)
Cell biology
Organisms respond to changes in their internal and external environments (a-level only)
Organisms exchange substances with their environment
Biological molecules
Organisation
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Ecology
Cells
Show all topics
2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
Inter-war germany
1f industrialisation and the people: britain, c1783-1885
2d religious conflict and the church in england, c1529-c1570
Medieval period: 1066 -1509
Britain & the wider world: 1745 -1901
The cold war
1c the tudors: england, 1485-1603
2o democracy and nazism: germany, 1918-1945
1l the quest for political stability: germany, 1871-1991
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
Show all topics
6
0
Erica
10/03/2023
Psychology
Sampling
Random sampling methods in research offer both advantages and disadvantages, impacting study outcomes and reliability. This summary explores various sampling techniques, their characteristics, and implications for research design.
10/03/2023
353
This page provides a detailed evaluation of the sampling methods introduced earlier, discussing their strengths and limitations in research contexts.
Random Sampling:
Systematic Sampling:
Stratified Sampling:
Opportunity Sampling:
Volunteer Sampling:
Highlight: The impact of volunteer sampling on research study outcomes can be significant, as it may attract participants with specific traits or motivations, potentially introducing bias into the study.
Example: A volunteer sample for a health study might attract more health-conscious individuals, potentially skewing the results towards healthier behaviors or outcomes.
Vocabulary: Researcher bias refers to the potential for a researcher's personal beliefs, experiences, or preferences to influence the study design, data collection, or interpretation of results.
Average app rating
Pupils love Knowunity
In education app charts in 17 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
Random sampling methods in research offer both advantages and disadvantages, impacting study outcomes and reliability. This summary explores various sampling techniques, their characteristics, and implications for research design.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page provides a detailed evaluation of the sampling methods introduced earlier, discussing their strengths and limitations in research contexts.
Random Sampling:
Systematic Sampling:
Stratified Sampling:
Opportunity Sampling:
Volunteer Sampling:
Highlight: The impact of volunteer sampling on research study outcomes can be significant, as it may attract participants with specific traits or motivations, potentially introducing bias into the study.
Example: A volunteer sample for a health study might attract more health-conscious individuals, potentially skewing the results towards healthier behaviors or outcomes.
Vocabulary: Researcher bias refers to the potential for a researcher's personal beliefs, experiences, or preferences to influence the study design, data collection, or interpretation of results.
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 key concepts in research sampling, defining population and sample, and outlining various sampling methods. Each method is briefly described, highlighting its unique characteristics.
Definition: A population is the entire group of people a researcher is studying, while a sample is a smaller subset of that population used for research.
The page covers five main sampling methods:
Highlight: Understanding the difference between systematic and stratified sampling methods is crucial for researchers to choose the most appropriate technique for their study.
Example: In systematic sampling, a researcher might select every 5th person on a register, while in stratified sampling, they might divide the population into age groups and select samples from each group.
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
