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Sampling Methods and Bias with Surveys: Crash Course Statistics #10
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- Опубліковано 27 бер 2018
- Today we’re going to talk about good and bad surveys. Surveys are everywhere, from user feedback surveys to telephone polls, and those questionnaires at your doctor's office. Still, with their ease to create and distribute, they're also susceptible to bias and error. So today we’re going to talk about identifying good and bad survey questions, and how groups (or samples) are selected to represent the entire population since it's often just not feasible to ask everyone.
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Hey all, fill out the official Crash Course Statistics Survey: bit.ly/2J1zimn And if you don't want to, help us fight non-response bias by filling out anyway! We'll be analyzing this data in future episodes. (All individual data will be kept anonymous.) - brandon
I assume we'll be seeing the results in the next episode?
That last question... Just, so poorly constructed I hope the survey wasn't hijacked. Otherwise, it was weird but that only makes the whole thing and the data you collect from it and then what are you going to show us from it, and how does it... BLARG... MUST wait for "results show"... "mumble, mumble, reality contest shows, mumble, mumble, rigged outcomes, mumble, mumble, Adam Lambert should have won, mumble mumble..."
I did my part
What’s your plan with the gang of raccoons?
CrashCourse - Raccoons are tough !
I wasn’t going to comment, but you convinced me to do so, just say that you are noteworthy, Adriene.
Shout out to us who don't usually comment on things but did this time because she implied we don't enough!
😄
Same here. Actually, I have never in my life commented on UA-cam, but I must say, Adriene, and the channel is totally noteworthy. Thank you for all the great content, I love it.
I'm just leaving this coment to inform you that you did an satisfiing job at entertaining and educating me.
I'm commenting (something i generally don't do) to say that this course and the econ course have both been super useful to me just recently
Adriene, you are definitely noteworthy! Love this series!
You're noteworthy, as I enjoyed watching your videos. They are very educational and are way better than traditional classroom lectures 👍
You're noteworthy, Adriene! This topic actually is one of my interests. Thank you for the effort. 😍😍😍
I feel like I'm overestimating my resilience to raccoon attacks.
I honestly feel like I could take on a lot of racoons. I mean, they're small, and presumably have little to no knowledge of basic strategy and very little comprehension of tools. I feel like if everything worked out in my favor and I could evade them for long enough, I could just turn them into a real life mob grinder and take on infinite raccoons. The answer I put was based on the idea that I do not succeed in this, and am forced to fight in the open but am allowed access to dedicated fighting tools
I was asked to take part in a survey where they compared a political candidate to a clown. Definitely a leading poll.
Alverant
Some people lack the proper respect for clowns.
They didn't compare him to a clown... Donald Trump IS a clown...
Daniel McLaughlin
That’s frankly an insult to clowns
That wasn't a survey, it was the election.
I sense the OP's sarcasm.
Don't Forget To Be Asking Questions.
Don't forget to be doing what? I forgot what it is.
I'm LOVING this series!! Can't wait for the next episode already.
Adriene, You are not only noteworthy but a witty, funny and a very good presenter as well. I am in love with you after watching all these tutorials. I am gonna keep supporting this channel on patreon. Thank You!
I just want to say that, without fail, each time I click on one of these statistics videos I get that Google ad stating that teams wearing blue are more likely to win. In fact, Google has several versions of this ad and each states a statistics based fact that seems like it was misinterpreted from a data set... right before a video about interpreting data.
It's too meta for me.
And BTW, Mrs. Hill... you are always noteworthy.... I am following you since your Economics Course...
Who loves CrashCourse??
who doesn't??
it's one of thr33 or for channels im subscribed 2 rogan, vsauce, somthing else maybe. but my utube addiction is growing
It's like that "4 out of 5 dentists recommend [brand]" - The original question was "Which do you recommend, [brand] or not [brushing, flossing, using mouthwash, etc]?"
You are noteworthy! Love this series!!
Cramming last minute for a stats exam and this is soooo helpful! Thank you so much!
Same here!
Thank you for the awesome crash course on stats! Going back to grad school and haven't taken stats before yet a two hundred level stats class is part of the curriculum! You are saving me!!! Keep up the great work!
Thank you, a very good description of all possible limitations 😊 I know, that this is the course in statistics, but it would be also interesting to see something on qualitative methods and how two can be combined
hearts for saying "different sex" instead of "opposite sex" ! great video :)
thank you, noteworthy host and staffs.
You are very much appreciated with your work in explaining stats in a very simple format with excellent examples& understandable to everyone, many times for clarity I revisit your channel, keep up the good work Ms Hill
My old employer used to require employees fill out employee satisfaction surveys every year, and the questions were always super leading; in some cases the questions didn't even give an option to show dissent.
This is a good explanation for why an online poll like Rotten Tomatoes is unreliable. ;)
Well its a bigger problem that movies can only be fresh or not fresh, and that is the metric that is featured most prominently. When you look at an out of 10 score on RT it's more normal.
I wonder how many normal distributions will show up from this survey...
Oh and my random number was provided by Google's rng ;D
Thats crazy
just need to say that this course, and, Adriene Hill who was brought it is very noteworthy
Surveys are data collection tools, they are not inherently experimental or non-experimental. In fact the most common way to collect data in an RCT is with surveys XD. As a rule of thumb, experimental methods are those where your treatment and control groups are randomly selected, quasi-experimental are those where they are not randomly selected and non-experimental are those where you don't have a comparison group. Surveys can be used in all of them. Still, this series is a great idea, keep the good work!
Awesome job showing a man as a stay at home parent! Way to crush gender norms. Men should not made to feel any worst than a woman; having not been or are the bread winner.
The racoon question was tough to answer realistically, I live in Australia, I've never seen a racoon in my life and my likelihood of encountering one is virtually non-existent. That being said, I am Australian, defeating armies of cute dangerous things is pretty common place so here so it's hard to judge.
Thanks, I am using this material to help me become a data scientist
Hospitality Hero same
You're noteworthy, Adriene!
Amazing content! I have never heard of so many kinds of sampling methods.
Amazing course
Thank you CrashCourse team
This really helps! Thanks!!
You are noteworthy.
This series is noteworthy.
How do you know I am not an evil dictator. Are you identifying me?
OR, maybe he is evil dictator running a cybernetic empire, using false data to gather secret wealth from the shadows, like influencing the stock market, mistranslated key words to secretly indoctrinate people, cause wars with cyber attacks. Misinformation has to come from SOMEWHERE! Where else to start then from "innocent" you tube comments! (From a person who is DEFIANTLY not an evil dictator...not at all...would this face lie to you? :P)
Statistically, there are very few evil dictators, so the odds that you are not one are pretty high.
Hilarious wannabe-strongman U.S. Presidents have time to tweetstorm. Also, on a vaguely related note, I have a Joe Biden #47 Philadelphia Eagles custom replica jersey.
i don't think she has the means or motivation to identify u on the internet dan
I'm not a dictator... :D
*Adriene:* “...and since it’s statistically unlikely that any of you are evil dictators...”
*Me:* “aw... dang.” :(
The survey asks how many raccoons could you fight off before they overtook you. But it didn't give an option for all answers (I learned that from this episode!). I wouldn't fight them off. They are my little buddies.
AWESOME! I've been waiting for this episode! Thank you so much!
Kindly add something like this to the description...
Types of bias in a survey... 1.Non response Bias 2.Voluntary response bias 3.Under-representation
Can we get a Crash Course Evolution? With the most common misconceptions about evolution (e.g., that it's completely random) are addressed?
Adrian Hill is really reinforcing some of the general attitudes (be wary of fake polls) encouraged by Crash Course Media Literacy.
A good method I use while pondering is to do analysis on subject matters that are unknown to many or most of the population. Give it a go if you like, you’ll be surprised on how a lot of major functions in our Society got their jump from even the most trivial of things that we ignore or deem common.
You are noteworthy, Adriene!
❤️ for using "different sex" instead of "opposite sex"!
You know I absolutely love that you have started a crash course on statistics and I watch every video over and over again, but where is the next???? If not anything else, at least mention the date because if you don't send videos every week people will lose interest
Thanks!
Ugh, I had to ask a bunch of kids a survey question that was written by someone else. It was "you never take things that don't belong to you" and they had to rate how true it was, and it was the only question in the list that was written with a negative, so i think that people were likely to answer it backwards. there were a lot of other problems with the survey, and i am annoyed that we weren't allowed to modify the survey for future participants as we noticed problems. the terribly-written questions were just not getting any helpful information.
Hello Crashcourse, you are amazing! Awesome and mega cool. You are doing a very good thing!
Have you thought about adding a few control questions, tasks and case studies? Granted, this is more work but this would make you even "pioneerier" :) May be the community will help?
Before 50 views. Feeling lucky. Love you Crash Course 💕💕
I have a very positive or a very negative opinion.
Thank you for the amazing videos
It was fun filling up the survey🤗💕💕 Hit a like if you agree...
Yes.
Also, if this is not too much to ask, can you put sources and references in the description? A textbook section or even some useful links are good.
Bob Fearnley Thats data is for you to find. But, what would you like to know?
Hey I use this series in 2019 before my masters stats class to get an idea of what is going on. Thanks for the effort to make it all easy!
You and I both know people can't choose random numbers! 😡
4 is guaranteed to be random.
What are you talking about. I totally chose the random number 24
97. Ha!
I usually just put Pi, or a reasonable decimal approximation.
I have a very positive opinion
Thank you, thank you, thank you
Snowball sampling reminded me of a joke!
What's the difference between a Snowman and a Snowwoman?
-Snowballs!
That was terrible. I'm stealing it.
Just amazing !!
you are noteworthy love from india
Hi ! I have ask repeatedly to be taken of the list !!!
Now i get 3 or more a day I SCREENSHOT them , I’m making list , so far I have 12 names ! Just started a week ago !!
I’m Disabled and have young SON can’t afford to NOT answer the phone !!!
I’d like to know who you shared my information with and take me off you list ????!!!???? Thank you 😊
The phone company Say’s if i do this and I have repeated calls they can help !
You're noteworthy , Adriene : D DFTBA
You!!! Are!!!! Noteworthy!!!!!!!!
Very very interesting
This video was remarkable in the fact that i have made a remark with regard to it. But, you know. Not too bad. Not like "woah!" But nice
Confetti
Do the survey y'all!
Regarding 538.... I want them to do a story "Why can't 538 turn a profit?" ESPN is supposed to be trying to shop them.
I just filled out the survey you linked. Was it a test to see if we'd learned ANYTHING from this episode?
How is stratified random sampling different than the randomised block design from the previous video?
Had the same thought. It is almost the same I guess.
Monty Hall is media!
William I - also know as William the Conqueror and that census was known as the Doomsday Book
Guillame the Bastard.
Love it
You've mentioned random numbers a few times. Will one of the episodes cover 'random numbers are hard to get'?
i just realized she had no idea about the coronavirus at all !
my cat is an all powerful evil dictator XD
You might be right, but I'm going to need a bigger sample group.
You are definitely noteworthy Adriene.
*_...you could do what astronomers do and look at marital vs lifespan universally, (In other-words 'think of the universe as your larger experiment and collect your results')-but then again you're talking greco-bacchanalia/roman-saturnalia-wedding-marriage designed for gladiators-and-not-so-gladiators to do battle and die-away at empirically decreed ages..._*
noteworthy
Okay, hold it. Do you guys have a time machine to know the cost of the U.S. census in 2020??? If so, please send me the blueprints!
Please make Crash Course Calculus
CRASH COURSE CALCULUS !!!
Doh!!! Here comes the migraines.
please teach us analog and digital electronics according to those books written by nigel p cook
So what your saying is that they are usually bias no matter what so why do this In the first place to be bias.
Just as a thought, the census is actually not that good, in spite of the cost.
Lots of humans, lots of human error, etc...
The recent concerns about people being intimidated by questions on the census being used to punish them (responder bias) and issues like the Jedi Knight census phenomenon (intentional faulty data) are problems inherent to the design.
This course may praise the census, but that’s not a universally held opinion, and parts of the census are conducted by sampling to much controversy.
7:10 Strata
I wanted to see the current result of survey. It was so damm funny.
I wish i could understand most of the i speak with !!!
Wasn't Virginia Slims sponsoring women's tennis (including Billie Jean King) at this time?
the pizza question was like WAY inaccurate cuz 1) I don't exactly count my pizza and 2) there are quarter slices and there are 1/8 slices of pizza. Which one?
How long does the US census take to analyze now?
WHAT HAPPENED TO THE NEXT VIDEO?
Dont worry your noteworthy, im taking notes for a quiz on you right now XD
I'm learning statistics to*** become an evil dictator.
i done a few surveys where i just outright trolled and TYT reminded me of one and they had it as canada being enemy after asking all this other information about canada and i gave all positive stuff and enemy was there and i was like come on if you put enemy i am obviously going to click it
it was great i love trolling on surveys it made cenk laugh (he didnt know he read mine off but it was great and i forgot about doing it until a bit after that video but in the comment section i did tell him if i did that survey i would put enemy because its to hard not to)
I am neutral in my feelings towards this video and therefore will not rate it as a LIKE or a DISLIKE
Poorly* worded polls. Polls that are worded poorly.