Sampling: Population vs. Sample, Random Sampling, Stratified Sampling
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- Опубликовано: 3 авг 2024
- In this video, Dr. Kushner discusses the difference between a population and sample and breaks down two types of (probability) sampling: random sampling and stratified sampling.
Great Teacher. As a ADHD-Dude i gotta say, i had no concentration issues watching you! Greetings from Germany
Exactly, same here!!
You are an excellent instructor. You will go very far! I have watched any videos about this topic and still. I would end the video with the same dumb level of understanding as when I began the video. But when I stumbled across this version of the video, I had no other choice but to understand "Sampling Methods". I understand clearly the entire ramification from every introductory level aspect. thankssssssssss
Such kind words! Thank you so much 😊
Your teaching communicative skills are off the charts. Your simplification of a generally complex topic is refreshing. Thank you.
Thank you for the kind words :)
This was a great explanation and I watched like four other videos before this. This was the best one as I am a visual learner
Great to hear!
you teach in an amazing way sir, my concept is solid clear now. Literally spent ages looking for a good stats video since ive never studied the subject before and found this gold. THANKYOU! keep going!
thank you for the kind words :)
Check your understanding:
Administrators at Jones Elementary School surveyed a random sample of 100 of their fourth graders to see how they felt about extending recess time from 20 minutes to 30 minutes.
Identify the population and sample in this scenario.
A. The population is all students at Jones Elementary School; the sample is the 100 fourth graders surveyed
B. The population is all fourth graders at Jones Elementary School; the sample is the 100 fourth graders surveyed
C. The population is all fourth graders at Jones Elementary School; the sample is all the students at Jones Elementary School
D. The population is all students at Jones Elementary School; the sample is all of the fourth graders at Jones Elementary School
I think (B)
B. The population is all fourth graders at Jones Elementary School; the sample is the 100 fourth graders surveyed
B
B
Giving the example of Stratosphere (i.e. layers) to explain stratified sampling was so cool! It made the missing connection in my understanding! Thanks!
Glad I could help!
More cleared.... Simplified.,.. Excellent presentation.... No boring.... 👌🏻👌🏻🔥🔥 V. Good
So nice of you! Appreciate the message 🙏🏻
Wow I'm so glad I have found your channel! You explain very interesting and understandable ❤
Happy to help 🤓
That was very helpful, thank you so much.
You're very welcome!
Thank you so much because I'm struggling. I hope your channel continues to grow because you're doing a brilliant job!
New subscriber...looking forward to more content.
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You have a great methods in teaching and you simplifying the topics to make it more easy for learners to understand, thank you very much. Keep it up.
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Thank you, you're such a great teacher - this really helped with my research methods class for grad school!
You're very welcome!
you are a life saver
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I wish you were my economic statistics tutor, I would not have had to do the course twice haha. Great video and the visuals are really helpful..
Happy I could help!
love how you explain everything
Thank you for watching!
really good - simply explained
Thank you so much. I have a hard time with some of this type of math. You explained it well
Glad I could help!
This is incredibly helpful to me as I prepare for my Research Methods exams tomorrow
Best of luck!
Excellent examples and descriptions! Just what I was looking for!
Thanks for watching :)
Wow... very informative...
Glad it helped!
Thanks a lot!
This was really helpful thank you ❤
You're so welcome!
Nice video
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I really appreciate it
Thank you 🥰
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Excellent
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Amazing
Thank you! Cheers!
I've watched this video so many times! =/ I’m having difficulty with my homework! I want to know if I am doing this right. Any feedback would be highly appreciated.
An airline company would like to know the number of pieces of carry-on luggage (on average) on each flight. However, instead of looking at every flight, the airline company decides to take a sample of flights.
1. Describe a simple random sample to create such a sample.
Population (N)- entirely of something- All flights
Sample (n) - part of the population- select based on features and characteristics- first class, economy, international and domestic flights.
In order to take a simple random sample of a sample of flights, we can select based on criteria mentioned above and use a computer random generator to generate random numbers.
2. Describe a stratified random sampling technique to create such a sample.
In a stratified random sampling- the population of flights would be divided into different subgroups of the population (strata). Stratas are homogenous to themselves. In this case, each characteristic can be its own strata (first class, economy, international and domestic flights). All passengers who fly economy, would be placed in one strata or subgroup. All passengers who fly first class would be placed in its own strata. All passengers who have domestic flight, would be placed in another strata. All passengers who have an international flight, would be placed into another strata. After each strata is formed, we can take a random selection sample of each strata to ensure that every specific subgroup was represented, thus we can make better inferences about the population.
This looks great!! I wouldn't change anything :)
Perfect!
Thank you sir, can you also recommend a good book for this topic?
What is the stratum from this stratified
What is the difference between Stratified Sampling and Cluster Sampling?
Which method of sampling can be used when conducting a research on bullying in a certain area?
Hi sir, plz upload vedios on theriotical and conceptual framework and analysis and interpretation of data.
Our exams are nearing.
What topics are you thinking about?
good presentation , may you differentiate for me stratified and cluster probability
I found this link which may help clarify: keydifferences.com/difference-between-stratified-and-cluster-sampling.html
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