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- เผยแพร่เมื่อ 28 ก.ย. 2024
- View full lesson: ed.ted.com/less...
When we measure things, most people are only worried about how accurate, or how close to the actual value, they are. Looking at the process of measurement more carefully, you will see that there is another important consideration: precision. Matt Anticole explains what exactly precision is and how can help us to measure things better.
Lesson by Matt Anticole, animation by Anton Bogaty.
For short,
Accuracy: How close you can get to the correct result
Precision: How consistent you can get that result
yep
Dipper and Mabel thank you i had trouble understanding
Accuracy: Hit rate
Precision: Critical-hit rate
smh
The wise words of a true pokemon master xD
So, your comment is accurate or precise?
Since English is not my native language, I thought those 2 words were synonymes
Honestly, most native English speakers don't know the difference either.
What does that have to do with native english speakers?
GoldenPit maybe because you understand your native language better...
To be fair most of us thought they were too!!!
Since English is my native language, so did I.
The difference is like splitting hairs in most contexts to be honest
It is my opinion this video offers a precise definition of accuracy and an accurate representation of precision.
***** precisely
***** Very accurate.
Dead on target?
Anthony the III Precisely. :D
Yeah, it was well done. To be honest, I always thought that accuracy is something physical in the sense of how close one gets to the target and precision similar to this but more abstract and more about non-physical things but it turned out to be slightly different than that :D
the story actuelly stems from a myth in nordic tales:
a man drink a little to much and bosts about his archery skills
the king makes him a bet; if you can hit the apple off you sons head i will never tax your farm again.
the man places his son 100 m away and pulls out two arrows
he tasted the wind took aim. and hit on the first shot. a round off applause is given'.
the king then asks: why did you take two arrows when you perfectly hit on the first?
the man answer: if i had missed, the other would have been for you!
Doesn't sound like he had a high level of precision.
Kinda seems like this Nordic fellow was rather idiotic. In actuality the story probably got to Switzerland via the Germanic tribe the Alemanni who Conquered much of eastern Switzerland and the story was eventually found by a Swiss story writer who changed somethings to fit with the setting in which the story of William Tell took place ( the 1290's ) during the time the old Swiss Confederacy was formed.
ludvig schroll lol
Thug life
Damn
He kept saying William Tell throughout the video, when the actual german name is Wilhelm Tell. He's not accurate cuz he isn't right, but he's precise in his inaccuracy cuz he's consistent with the pronunciation. Thanks I'll go gloat now.
Meta explanation that's also accurate
His Anglocized name was William. Names change throughout languages.
Great! I'll be using this in my class to help illustrate the difference! :-)
Hahahah
And his friends probably called him Willi.
In short conclusion, "precision" tells the consistency of making the same result ,and "accuracy" tells how close or far is your result from the real one. These two answers are used daily and are really important on things like engineering and chemistry(as shown in the video).
Thanks for explaining better than my math teacher Ted-Ed
This has nothing to do with math...
Well, my math teacher was talking about it in our class, and it was mostly similar, and it was a lesson in our math books, but maybe it wasn't, idk
+Toy DavisAvis This is more related to statistical analysis which in theory you'd only need of you're wanting to become a scientist. I don't know why you'd have a lesson about this.
I don't know either heh
people usually blame math teacher even if they step on a shit
Q.Where can I buy apples? A.Where they sell apples (accurate) A.At the Monty fruit shop just around the corner (precise)
As long as the answer is right, it's accurate.
If the answer is consistently right, it's precisely accurate.If the answer is consistently wrong, it's precisely inaccurate. If the answer is inconsistent, it's imprecise, some answers will be accurate, some will not be accurate.
Muhammad Saqib Mudabbar .
Muhammad Saqib Mudabbar Thanks bro... Totally got it now!! But did not understood the application of them in archer 😐😐
this comment sums up the video, it saves you about 4 minutes and 30 seconds :D
In that case you should just use the word consistency instead of precision, this whole video is BS.
Dr. Saqib Isnt that about being specific
The word precision is so confusing. You all should just use consistency instead. That's what I learn in school.
That way you don't have to confuse yourself with the language barrier.
Here's an easy way to understand the difference
1.bp.blogspot.com/_PyvjcvYfRLk/SWHumaQY-fI/AAAAAAAAAW8/suw87QVBIl8/s400/accuracy+vs+consistency-02.png
chronousnemesis thank you. i came to learn from the video but i learned from this comment instead.
chronousnemesis The terms used in this video, accuracy and precision, are commonly used in numerous statistical textbooks. Although the two terms are confusing from the standpoint of standard English, they are the correct statistical terms.
Nathaniel Selby Thank you for the clarification and it is indeed true where precision means standard deviation of the estimator (estimated values) in statistical point of view. I also found out that in statistical also use the word bias instead of accuracy for the difference between the actual value and estimated value.
I just wanted to express that it would be better if we use consistency although the term precision may have been set up in their textbooks. IMO, it might also be better if we separated the terms use in statistical and science.
chronousnemesis Fair enough. Often technical jargon is needlessly confusing.
This isn't a great example - its too esoteric. I once had a VP-level interviewer ask me "what is 37 times 37"? My answer was, "its a number between 0 and infinity". He said, "no thats not the right answer", and I said, "actually it's 100% accurate. What you're referring to is precision, so let's get more precise ... "/ and yes I got the job :)
okay now you've confused me more than I was before.
shouldn't you say, let's get more accurate?
no, because the answer I gave was accurate, but imprecise.
Oh, that's a lot clearer answer than I got from the video. Thank you, I will stop watching now (:
If you estimated the answer doing 40*40 and saying that it is around 1.600 that would be more precise?
what's the difference between accuracy and precision?
after rewatching this video 5 times, i still have no idea
+clock san As I understand it:
Accuracy - 1:31 How close you come to the correct result.
Precision - 1:41 How consistently you can get that result.
for example, if u want to measure the mass of 1m³ of solid iron, u use electronic balance, and each time u measure the solid iron, u may get DIFFERENT results with using SAME apparatus(ele.balance), and that means the PRECISION of ele. bal. is not high enough as there is obvious fluctuation of measured value.
For accuracy, as mentioned in the video, it stands for how close u come to the true/ exact result (in this case, value of 1m³ of solid iron), and i need to point out that sometimes the exact/ true result is impossible to be obtained
Nice that really helped. Thanks
me too
Precisely accurate?
Petra Quartz ...wait omg idk anymore
Accurately precise?
precision increase decreases accuracy and accuracy increase decreases precision. They are closer to being opposite than similar (but they are not the same thing and not fully opposite. The methods of reaching the correct target should be the main focus when trying to understand them)
means hit the same spot multiple times but not at the target?
1. Accuracy :- How close you can get to the correct results While 2.Precision :- How consistent you can get that results
What does consistent mean
why don't they just use the word consistency then?
Precision depends on consistency. If there is consistency, the device is precise. No consistancy, no precision.
Muhammad Saqib Mudabbar
I meant why don't they replace precision with consistency.
+bananian Yeah consistency sounds way better
Precision is the consistency of the accuracy, not the consistency itself.
Because there is such thing as a synonym
The Animation done to explain these terms is very good😊
This 4 minuet video taught me more than a teacher did in a whole week.
Woow,
Your analogies and examples drive the point home accurately. I remember my remote sensing lecturer struggling to explain this distinction years back at college.
I' so glad you said "off his head" and not "off of his head". Too many ignorant people use the latter expression even though it's completely grammatically incorrect.
Precision is related to the equipment in two ways:
1. Degree of exactness in reporting "Individual Results": A measuring tape is precise to 1mm, while a Vernier Caliper is precise to 0.1mm.
2. Ability of the instrument to produce consistent results over a "number of readings". This is what has been explained in the video.
Accuracy is related to the person using the equipment and depends on his expertise in use of the equipment, adopting correct procedures, and applying necessary corrections to obtain the results.
Thanks this is probably the only video I found that I can understand
In statistics and other fields like machine learning, these are often described with "bias" and "variance".
Variance is... how much a variable varies (duh!), so high variance = low precision (according to this video's description)
Bias is (basically) how far the average value is from the one you expect, so high bias = low accuracy.
Assuming it’s precisely noon:
Precise, but inaccurate clock: 1:00:00.000 PM (maybe someone forgot about DST, so calibration was wrong)
Imprecise, but accurate clock: 12:00 PM (no display for seconds or milliseconds- probably off by a bit but with no way to read how far it’s off)
Imprecise and inaccurate clock: 1:00 PM (both of the above issues)
Precise and accurate clock: 12:00:00.010 PM (near the right time, displaying small increments- the 0.01 second it is off is pretty small)
Note: This is all relative. Clocks can be more or less precise than any of the examples (like 12 PM, 12:00:00 PM, or 12:00:00.010386 PM), as well as more or less accurate than any of the examples (like 2:00:00.000 PM, 12:15:00.000 PM, or 12:00:00.001 PM). Finally, if something’s accuracy is perceived to be 100%, that’s probably just because its precision isn’t 100% (like the clock displaying 12:00 PM), and 100% precision is also impossible since you can always add more decimal places.
When he said legendary marksmen I was like ROBIN HOOD!!!
me too then I'm like wait, who?
I was presicely looking for this video and it accurately explained me the difference.
I love these animators! Love them too much!! Thanks for clearing this up! 🌹🙌😁
From chat GBT :
Accuracy and precision are two important concepts in measurementAccuracy refers to how close a measurement is to a known or accepted value, while precision refers to how reproducible measurements are, even if they are far from the accepted value 1.
To illustrate the difference between accuracy and precision, consider the following example:
Suppose you are trying to hit a target with an arrow. If you hit the bull’s-eye, you are accurate. If you hit the same spot on the target every time, you are precise. If you hit the bull’s-eye every time, you are both accurate and precise 1.
In science, math, and engineering, accuracy is often expressed as a percentage of error between the measured value and the true value 1. Precision is often expressed as the standard deviation of a set of measurements 1.
Here’s a simple mnemonic to remember the difference between accuracy and precision: Accuracy is about getting close to the target, while precision is about getting consistent results 1.
I hope this helps! Let me know if you have any other questions. 😊
- Precision and consistency are two different things.
- How accurate is how off from perfection.
- Being precise is not having any other possible alternative.
I'm just gonna say what I learnt in class:-
Accuracy: how close the result or average of results is to actual value.
So peak of occurrence graph is on actual value
Precision: how close every result is to other.
So occurrence graph has a steep peak.
Also low accuracy means high systematic error and low precision means high random error
In lamens terms I'd say accuracy is how close the value is to the true value while precision basically means in the same ballpark. For example we virtually never say "how precise is it?" We say "precisely" But rather "how accurate is it?"
@@Historywithapharoah yep
Thanks alot this really deserves a like.
Helped me alot with my study lol.
I believe the point here is Precision is always far more important than accuracy.
Kevin Lane not quite, there are ways to improve both but in this case, high precision and low accuracy has a better fix
Xuan Bach Lai Thank you.
Kevin Lane Not always
Kevin Lane it is because is there really such thing as precision without accuracy? not praticaly. lets say i shoot a basketball and everytime its 4 eaches on the left. well i must be dumb not to know how to ajust so it goes in. in real life theres no such thing as precision without accuracy
Kevin Lane most of the time.
Semantics. Semantics is the difference between accuracy and precision.
It’s not the difference but a better understanding of semantics can help people understand the difference
I think you mean "cement tactics."
For military
Accuracy: i need to destroy this grid square
Precision: i need to destroy that building in the grid square.
👍👍👍👍👍
Good one but actually bad😄
he difference is very interesting and important when talking about any subject.
this explained it more than my teacher. this really helped! thanks Ted-ed!
Great explanation
Nice depiction here.
It is better to be precise rather than accurate however both work well together
it was a splendid video and explained everything clearly thanks
I am still confused.....
Accuracy is how close your measurements get to the true value, while precision is how close your measurements are to each other.
Water boils at exactly 100 C, which means you could say it boils at 100.0000 C as well (it's a definition).
A thermometer in boiling water that reads 100 C is more accurate than one that reads 98.843 C, but is a less precise measurement.
Mutantcy1992 thanks.....your example is quite easy to understand....
Mutantcy1992 helping out in every comment thread I see here lol, good contribution
+LDiabolo Cheers!
Gratidão TED-ed!
Every time i see you i get better u.u
I suck at this, can someone clarify
Accuracy: if you can hit it
Precision: how you can hit it
??
+TG CoffeePlus Accuracy- how close you are to the correct result. Precision- how often and reliably you can get that correct result.
+Gecko Gold so
Accuracy: How close you are to hit it
Precision: How often you can reliably hit it
+TG CoffeePlus For the scattered results -> no precision, but if the center of those is at the right spot, there is acurracy.
For the clustered results, off target -> no accuracy, but precision
+TG CoffeePlus Accuracy = How close you come to hitting a bullseye with an arrow on any given shot
Precision = how reliably you can hit the same spot on a target each time you fire an arrow.
A single arrow needs to be accurate, but when firing multiple arrows over a time, it's easier to fix the aim of a precise shooter, than it is the make the arrows less random for an imprecise shooter who occasionally lands a perfect bulls-eye.
+TG CoffeePlus think of it like this
you have a circle, your arrow will hit _somewhere_ in the circle, you dont know exactly where though
accuracy is being able to put the circle on the target, precision is having a smaller circle
Ted Ed is precise in explaining things.
we learned about this in chemistry
I hated this question in the board exam. I was always guessing the answer, now I know. Thank you for the simplified explanation.
The main thing I took away from this video is the story of William Tell. I didn't know he was forced to shoot the apple off his son's head, I thought he was just doing it for kicks.
Yeah, The story is from Switzerland and basically the lord that was mentioned put a pole up with his hat on it and said everyone was to kneel when walking past it but William Tell refused and was forced to shoot the apple off his son's head or they would both be executed
more videos on distinction of concept please！
Do a superpower lesson about...
Heat vision
Duplication
Invincibility
If I have an object that is 10.001 cm long, and I measure it with a ruler, I'll say it is 10 cm long, because a ruler is not a very precise measurement tool. With high quality calipers, a more precise tool, I could say that it was 10.001 cm long.
With poorly calibrated calipers, I may measure that the object is 9.001 cm. This measurement is exactly as precise as the 10.001 cm measurement, but is inaccurate. The rule measurement of 10 cm is more accurate, but less precise, while the bad caliper measurement of 9.001 cm is less accurate but more precise.
I haven't watched the video yet, but I imagine they use the dartboard analogy at some point. This analogy can be useful for understanding accuracy and precision of measurements, but measuring tools have innate accuracy and precision, and one or one million measurements will not change those.
Thanks, Mr. Goff.
so basically;
a lobbing weapon (like a grenade launcher) isn't accurate, because it fires in an arc but its aim can be calculated to compensated.
While a shotgun isn't precise, because it can't hit a specific area no matter what your aim is like.
Pika Zilla those things are calculated over several tries
Pika Zilla that makes more sense for a gamer thx^_^
Addison Anderson...
His voice is sooo goood
Usually, they are referred to as "bias" and "variance".
Bias = how *far* (on average) you get from the correct result.
Variance = how much are the results spread around = how inconsistently you get the results.
What scientists usually do is to try and *minimize* either bias or variance, or some other combination of both of them (for a simple example, bias + variance)
"Validity" (specifically, internal) and "reliability" in (quantitative) research terminology🙂
The arrow at the end, who wondered what it was going to hit?
What is more important in doing a measurement (precision or accuracy)?
Precision is the degree of madness(if a result varies too much it is mad) and accuracy is how close is it each time
wow it's very nice information
Or you could just shoot for the moon, cause if you miss you'll land on the stars
You will not. The closest star besides the sun is 4 light years away. And even if you did land on a star, you wouldn't live to tell about it. In fact, you'd disintegrate on approach, and wouldn't land on the star at all.
Sabrina Thompson if you miss the moon you'll be in orbit arround the sun and never ever hit anything.
Accuracy can be represented as a calculated percentage (95%), a chance (19/20), or a margin of error (5%). It's a rate of success that is spread out in an area that can either HIT or MISS due a situation that creates this random chance.
Precision is understanding that you can consistently FAIL when aiming at a certain spot every time, but with a simple (or complicated) adjustment... this consistency can turn into SUCCESS every time so as long as there are no random factors in play.
A sniper, for instance, can utilize precision by lining his scope to compensate for bullet drop and wind speed; where he will most definitely meet his target as long as everything from gravity to wind speed is consistent (His accuracy to HIT is at 100%). However, this success rate can quickly drop due to an unsteady rifle (accuracy now 75%), a shaky hand (50%), and unpredictable wind currents (25%). And if, for whatever reason, the sniper chooses to not to be precise in his aim, his accuracy to HIT will almost always be at a very low percentage (when factoring in the miraculous possibility of an accidental HIT).
Bruh
My language doesn't have different words for accuracy and precision.
+Peleg Tsadok whar is ur language ? Mine has . They are called acuratețe and precizie.
mironadriana
Hebrew.
It has only דיוק - which is pronounced di-yuk.
+Peleg Tsadok mine has 2 words that are synonims, it confuses me a lot too :(
Mine too. It's Marathi.
In 1957 I was asked this question during an interview for a post in the pharmaceutical industry. I did not know the correct answer and I was rejected for the post. Now I know the answer having spent 30 years as a university teacher of pharmacology!
One of my bosses used to say "would you like to be generally right (generally accurate) or precisely wrong?"
Ted ed is like a scientific BuzzFeed
Zain Chupacabra that isn't cancerous
Zain Chupacabra except ted ed is not filled with a bunch of feminazi sjw's
Don't you dare compare Ted ed to something so Horrible.
what's your problem with ted-ed?
Please explain recall as well
Excellent method of teaching but please improve your video graphics.
This is accurately true and it presidly explains it to about accuracy and precision
this is a good analogy of firearms simply for the story told saying that that both can save a life
Wonderful, video. very elucidating! Thank you.
Please do a version of difference between intellectual person and a intelligent person
It would be great to develop the topic clarifying "Accuracy Paradox"
What makes this a bit more confusing for some people who do not speak English as their native language, many languages do not have separate words for accuracy and precision.
For example, here in Finland, we use the word "tarkkuus" to express both accuracy and precision.
In Physics if the actual result is 4.234 then say 4.001 is more precise as it has the same number of decimal precision whereas 4.3 is more accurate since it is numerically closer to the actual result
Ted ed reviving my highschool physics book.
Video is Precisely Explained and will Accurately targets many audience.
People who science teacher sent them ---->
Imo you can replace precision with accuracy or replace accuracy with precision. But usually people use precision for comenting on detail products, while accuracy used in shooting a target with bullet.
Someone needs to email all dictionary publishers, because according to them, the two terms are interchangeable. The Oxford Dictionaries, for example, define precision as the quality of being accurate, and accuracy as the quality of being precise.
... what?
same
the ending gave me goosebumps
this is inspiration
Amazing video!
It reminds me of chemistry class 11 First chapter😂😂where I understand nothing
But this is helpful
I'd have a math question as an example.
Q: What is 40 x 20 x 13? (You may only take 5 guesses.)
A1 (Precision only): 59000, 59001, 59002, 59003, 59004
A2 (Accuracy only): Somewhere between 0 and 99999999.
7.8/10 too little accuracy
On 21 October 2011, Matt Parker explained it in about one minute.
I here I thought I could improve my Osu! skills
Just practice mate.
I Just Love The Way The Peasant Is Drawn
So the boy died?
No.
Precision is about consistency and it is more important.
Accurately precise and precisely accurate.
So accuracy
Keep getting better
Precision
Jacksepticeye?
Precision is how many times you get it right or get the same outcome
berry precisely discussed, so that I accurately understood it.👍
3:12 I puked when he used a preposition at the end.
The shivering hand was too funny. XD
jeg er gay
His voice is so relaxing
So this is basically like controlling Bias VS Variation in statistics inference ?
Accuracy:
You can hit the target.
Precision: you can hit specific part of the target at set range and with amount of time.
And sometimes at said angle.
In biostatistics and for purposes of USMLE, is precision the same as reliability? And is accuracy the same as validity?
Accuracy = the percentage of the result that corresponds (on manageable scales) to the wanted result
Precision = the rate of the end result landing in the desired accuracy percentage scale
Precision is like running 1000 simulations
Accuracy is like taking for granted that the desired area of percentage (like if 80%-100% percentage area is desired) is manageable
For precision we need accurate details.
why do we need an entire ted-talk for a quick google search?