Sampling: Simple Random, Convenience, systematic, cluster, stratified - Statistics Help

This video describes five common methods of sampling in data collection. Each has a helpful diagrammatic representation.
0:00 Introduction
0:15 Definition of a sample and population
0:45 Criteria - unbiased, representative
1:09 Sampling error
1:36 Simple random sampling
2:23 Convenience sample
2:55 Systematic sampling
3:26 Cluster sampling
3:59 Stratified sampling
4:44 Choosing a sampling method
A useful companion video explains what sampling error is: • Sampling error and var...
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2 days of lectures combined into 5 mins. this was really helpful

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They get paid for hours, not minutes. Money is the biggest obstacle to real progress.

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Right???

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I'm taking a distance course with a entry level stat paper and my ADHD brain just CANNOT concentrate on the 30 min recorded lectures. I just find my eyes drooping and my brain turning off with boredom, so THANK YOU, this pretty much covered one whole lecture and I kept up on 1.5x speed.

[@fakuridesne]

thanks 1 hour lecture, simplified into 5 min video and understand better

[@DrNic]

Thank you. I spent a lot of time working out pictures that would help to explain the concepts.

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You could learn a thing or two form punctations

[@DrNic]

That's great to hear. I put a lot of thought into having good visuals.

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Thank you

[@nalinvimukthi7680]

Thanks in my ❤

[@sathyavel8046]

explanations are amazing to the point and the videos are v good. One of the best stats training videos in UA-cam

[@koranatsaengwat1217]

Thanks you so much. I found this easier to understand than the one I read from my lecture. :)

[@esthercohen8193]

I find these series of videos extremely easy to understand and helpful. Thank you

[@ChristeenLim]

"Learning and teaching statistics is surprisingly interesting with Dr Nic." true. Thanks for this!

[@muaythai2005]

Thank you for posting such a valuable resource.

[@TBC1599]

Awesome explanation... much easier to understand compared to the written paragraphs we were given. Thank you!

[@eduwisdom3328]

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[@Sincerely_Ibrahim]

Convenience sampling...for a quick and cheap poll:)
Great video. Your learning center is also brilliant.

[@Sats33]

Pictures and examples help a lot in understanding. Going through your videos its simply beautiful... U are very brilliant in your teaching..

[@r_bau]

Came here for sampling techniques to practice my chops, came out learning about statistics. Brilliant.

[@skomura]

THANK YOU. I misssed a day in my lecture, and I was able to recap it in less than 5 minutes.

[@user-gi3fb7gi9m]

You make it clear to me in less than 8 seconds.

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This was really helpful thank you.

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😂😂

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No
Hahahahah

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Thanks a lot, very simple and clear :)

[@disanimukasa-wilson1938]

Thank you so much Dr. Nic. Makes so much sense

[@aakhan8080]

you make it sound so easily that you nailed it maem

[@Abbas.Ladonni]

Perfect, Quick, and comprehensive. Thank you Dr.Nik

[@DrNic]

You're very welcome! I put a lot of thought into this so it's great to be appreciated.

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I finally got it, thanks for the video.

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This is amazing! Thank you so much for the effort you put into this video, rly appreciate it:))

[@DrNic]

Glad you liked it!

[@tophertodd2366]

cluster @ 3:24, stratified @ 4:00, and great explanation btw!

[@toomuchjen]

Exactly what I needed today. Thank you!

[@billyr.d.444]

Just what I need for my paper. Thanks!

[@tina89bgd]

Dear Dr. Nic, I am a non-statistical person listening to the statistical online course. Since I found your channel and a website, everything seems much easier for me. Thank you.

[@DrNic]

Thanks for sharing! It is so good to know that I am helping.

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Best video I've seen explaining this subject. Currently working on a big statistics project!

[@DrNic]

Glad it was helpful!

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Very helpful. Needed to understand for community medicine.👍

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Simply Amazinggg..............
Now I know Smapling on tips....
Thanks a lot, for such a Quality Video..........

[@NithilanDhandapani]

You are a real good teacher. Thank you very much

[@DrNic]

You are welcome!

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Hahaaaa have a quiz on this in three hours and honestly this has helped me more than reading that damn text book... thank you 👍🏾

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Watched the useful ad for this guy😊😊 kudos to you for my report coming soon!

[@jenniferrsn]

Thank you for this video. Very helpful

[@bryllqurtino8406]

Thanks to your discussion, was so amazing, actually I knew it just now.
Thanks, creates more happy days to understanding that even just so hard to learn but we will can.

[@DrNic]

Happy to hear that! I think you will find many of my videos will help you.

[@ashkew7404]

This is great. Thanks so much!

[@farzanehrasti]

Thank you! Fabulous explanation!

[@Johneysteel]

This is really good, thanks for sharing!

[@tonyahudson-pruitt1119]

Thank you, this explanation was perfect!

[@DrNic]

Thanks - pleased to be of help. As you can imagine, I put a lot of thought into these videos, so your feedback is much appreciated.

[@hlengekile]

Thank u I think i'm now clear with the stratified sampling

[@idilyorgancilar6594]

Wowww!! Finally a great instructional video!!! and comes with the coolest accent!!

[@DrNic]

Thank you. I do my best. ;)

[@choukribrahimhammache7743]

First of all, thank you very much for this fruitful video, it is short but it is also a good guide to sampling. Secondly, god! I'm in love with your voice hhhhhhh

[@samhume6283]

This is brilliant! And memorable! Love the funny illustrations too.

[@DrNic]

Thank you. It took a lot of thinking to come up with the representations. Glad it helps.

[@_WhereAreWeNow]

Thank you. This helped better understand different sampling types.

[@DrNic]

Glad it was helpful!

[@jamesbryan1005]

thank you for this idea, i appreciated

[@lavenderdaze]

This is really easy to understand statistics.

[@janetolujimi4388]

Thanks it was very helpful.

[@ladym7852]

Thank you , that was very well explained and put together.

[@DrNic]

Glad it was helpful!

[@giselegiram]

Nice video. Very useful

[@fernandomora6447]

Thank you DR. your video was clear and easy to follow.

[@DrNic]

That’s what I aim for! :)

[@AnhNguyen-di8xp]

Just want to drop a "thank you". You have no idea how much these mean to me. Simply saying "thank you" is just never enough. But..... thank you, I really appreciate it.

[@DrNic]

You are so welcome

[@anilmaximlobo7288]

Thanks so much Dr Nic !
Could you please post a video on sample size calculation .

[@DrNic]

You should take a look at another video on the playlist from the UCMSCI channel called "Variation - why statistical tests are needed". Pretty much sampling helps us to find out information about a population when it isn't possible to collect information on the whole population.

[@claudejrtemokang6185]

Well explained, thank you

[@alitfaily4904]

Thank you!! This was really helpful you saved me before the exams!❤

[@DrNic]

I'm so glad! I hope the exams go well.

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[@bernardgoliama3978]

Simple and well understood, Thanks

[@thiisnotanex]

never had such an easy homework( QA team=best team)

[@DrNic]

You are very welcome!

[@ariffaimanbinazminmustam9001]

Thank you so much for this video because it helps me to know better about types of sampling techniques

[@DrNic]

Glad it was helpful!

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thanks mam for such a convieniant lecture..its really healpfull...

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YOOOO this vid was GREAT keep em coming!:)

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Drink me

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Clorox Bleach LOL

[@mellbenito4984]

Thank you I now understand the different between each method!

[@DrNic]

That is good to hear. I put a lot of thinking into this, including the representations .

[@mydology1089]

30 slides in 5 minutes.
anxiety lowered 100 times.
May God Bless you

[@DrNic]

I am happy I can reduce your anxiety.

[@8bitapples]

I really love this video, understood so well. I dont normally leave comments

[@DrNic]

Thanks - I feel the compliment

[@David-ku7mt]

Great explanation, thank you!

[@DrNic]

Glad to hear it.

[@DrNic]

All the sampling methods listed, except for convenience are random. A simple random sample is one form of random sample, and is arguably the ideal, as each observation is chosen completely independently of all the others.

[@darksidegaming9682]

Double, multi stage?

[@DrNic]

@@darksidegaming9682 I presume you are asking if the two methods you used are random or not? If each observation has the same probability of being chosen, then the method is classed as random.

[@darksidegaming9682]

@@DrNic ty and waiting for ur new videos

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Thank you for your lecture you really simplified my work

[@DrNic]

You are welcome!

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I'm so glad!

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@@DrNic you're welcome

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what an awesome explanation!

[@DrNic]

Glad you liked it

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Thanks you very much.

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Excellent

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THanks - you are not the first to think that.

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[@DrNic]

Glad I could help!

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I never knew representativeness was a word! haha it sounds so funny. Great video, thanks.

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Great video

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I love listening to your voice.

[@DrNic]

That’s nice. Some people hate my accent. So thank you.

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@@DrNic Really? Your accent is actually beautiful. That's the part I originally wanted to mention about "love" your voice. I also wanted to say I love your brain, but it sounds odd. Thank you for video lessons. I'm learning a lot. I should have stayed awake in college.

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It's my pleasure

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You are most welcome

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Most welcome 😊

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i would like to know how to solve such types of problem?
The following absorbance data at wavelength 543 nm were obtained for a series of
standard solutions containing nitrite (NO2
) using a colorimetric method: A ¼0 (blank),
A ¼0.220 (5 mM), A ¼0.41 (10 mM), A ¼0.59 (15 mM), A ¼0.80 (20 mM). Using
Excel (a) to plot the calibration curve, and (b) to determine the calibration equation
and the regression coefficient (R
2
).