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Scales of Measurement - Nominal, Ordinal, Interval, Ratio (Part 2) - Introductory Statistics
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- Опубліковано 18 сер 2024
- This video reviews the scales of measurement covered in introductory statistics: nominal, ordinal, interval, and ratio (Part 2 of 2).
Scales of Measurement
Nominal, Ordinal, Interval, Ratio
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Video Transcript:
meaningful just like interval but it also has ratios that are meaningful and there is also a true zero point and by true zero point what we mean there is that zero means what we think of as zero typically or the absence of the property like 0 inches there is no length or what have you. OK so an example would be weight in pounds and here 10 pounds is twice as much as five pounds or other words 10 / 5 is 2 or 2 times as much. So that's a meaningful ratio and in addition to this zero pounds means no weight or an absence of weight so there's a true zero point. So if something is zero pounds that means it has no weight whatsoever. OK so now let's compare the scales and I think this is where you really can start to see some of the differences between these four scales more clearly as we really start to differentiate between them through examples. So interval vs ordinal we'll start there. Recall that our interval example was temperature and in that example a one degree difference is the same at all points of the scale that was our example of interval and then for ordinal we have the place in the race first, second, and third the difference in finishing between first and second now for ordinal is not necessarily and probably is not the same as the difference between second and third. Now you might say we'll wait a second the difference between first and second is 1 and the difference between second and third is 1 so that should be the same as interval. But what we need to think about here is to ask yourself let's say we're sitting there at the finish line and the person finishes in first and second those two let's say are neck and neck and the first place person just barely wins at the end and then along comes third place person much later so we have first the second neck and neck and then third comes along later let's say a minute later or something like that. So in this race the difference between first and second was very small but the difference between second and third was very large so those aren't equal intervals among the adjacent categories and that's why it's ordinal. So for this example it's ordinal because we know there's order to it 1st is better than 2nd, 2nd than 3rd but we can't say that those adjacent categories are equal. OK next interval versus ratio. Now the two qualities of ratio recall is that the ratios are meaningful and there's a true zero point, where zero means the absence of the property. Well think of temperature. Zero degrees how is it outside if you thought of zero degrees you wouldn't say there's an absence of coldness or heat outside you would say it's really cold, right? Zero degrees Fahrenheit it's 32 degrees below the freezing point so it's really cold. So zero does not indicate an absence of the property there and then in terms of the ratios if we think back to our ratio example with the weight of objects if I had a five-pound object and I had another five pound object and I put both those on the scale that would give me 10 pounds right total weight. But if I have a 40-degree day and I have another 40-degree day so a cold day and a cold day and I put both of those together I don't get suddenly a warm day 80 degrees. A 40-degree day and a 40-degree day is still a 40-degree day it doesn't suddenly equal an 80 degree day. So the ratio isn't meaningful there for temperature. So this is why temperature is interval and weight is ratio. OK and then finally let's take a look at nominal vs ordinal, interval, and ratio. So recall with our example of baseball uniform numbers the numbers only serve to differentiate between players. There is no order to them 25 isn't necessarily better than 23. There's no meaningful differences; I can't subtract 25-23 get a two and then my next number up let's say is 30 and 35 subtract 35 and 30 and get a 5 that doesn't make any sense. We wouldn't subtract uniform numbers and expect to get any meaning out of that and then ratios are not meaningful there's no true zero point. Think of someone who chose the number zero in baseball. That doesn't mean there's an absence of a baseball player there right zero means nothing that would just be a player with the number zero. So that's why baseball wouldn't be ordinal, interval, or ratio. Alright that's it for scales of measurement. Thanks for watching.
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I love this comment and compliment 🤩
True
This really cleared things up for me. My professor was going way too fast today in class and I was so confused. Khan Academy didn't even have videos explaining the different measurements...
I don't usually comment upon videos, but this was an absolutely wonderful lecture to attend!! I loved the examples and the way you simplified the terms.
Crystal clear explanation, thanks!
Hope u graduated
Thanks a lot for this great video. You're the first person who completely clarified the differences between Interval & Ratio for me. Thanks!
This was much better than my assigned reading, thank you for simplifying! Can you make another video with practice questions that you discuss the answers to? That would be very helpful. I'm still confused with "age" and other questions even after doing several online quizzes.
This really helped me out with explanation. Thank you for that cool voice and awesome video! 😄😉😆😇
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thank you very much,very helpful video, I laughed so hard at the end of the video, zero doesn’t mean the absence of player 😂
this was very concise in a short period of time. Thank you.
Very comprehensible! Thank you for such a clear and organized explanation!
Thank you so much for this video. I was getting confused on Ordinal and Interval until I saw this video.
I got so much value watching this. It's safe to say l'm ready and will surely crush my presentation on this topic today.
Thank you so much, have a better understanding of it now ❤️
Thank you so much. I have an exam in about an hour and despite getting the actual math, I was struggling with identifying interval Vs ratio. Thank you. Thank you. Thank you.
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This explained better than what I could have learned from a book.
Awesome video!
wow ....you made it so easy ....those scary terms seem like cup of tea...i know my scales now
It's so unfortunate that I can only like your videos once.... Thank you very much for such good explanation
really help my presentation preppy and make me understand about the subject. thank you so muchhh !!
Crystal clear explanation, Kudos man
Good videos deserve to be viewed in 2022
Great work simplifying the concept, really love the individual property comparison!
Wow 😄. You explained it very well. You got me laughing at the last example hahahaha. Thank you for making this video 😊
Amazing explanations - cant stop watching this!
U presented it in a very simple and easy way. Thanks
Now.. I get some kind of clarity 😃😃 good explanation. Thank you
THANK YOU..... It helped me like rain during drought while preparing for my semester.... :) REALLY GOOD JOB!!
Crystal clear... I would like to see more vedios... I m student of m. Phil and need such clear explanation.... Thnx alot
Wow this was probably the most informative , detailed video on levels of measurement here on UA-cam. You made my life easier, and for that I am grateful. Thank you so much for this informative video, i know its going to help me a great deal on my exam this morning :-)
Thank you for letting me know. Very glad to hear it!
GREAT video’s! Thank you so much, watching in Holland to prepare for my exams!
THANK YOU SO MUCH FOR THIS VIDEO, YOU EXPLAIN SO DAMN WELL. BLESS YOUR SOUL
Thank you so much for this upload. I have been struggling with Probability and Statistics and this video is helping.
learning it for my teacher exam ...i wish to be a teacher like you someday
Awesome explanation !!! Clarified the concepts really well.
From wiki: Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scales, of measurement: nominal, ordinal, interval, and ratio.[1][2] This framework of distinguishing levels of measurement originated in psychology and is widely criticized by scholars in other disciplines.[3] Other classifications include those by Mosteller and Tukey,[4] and by Chrisman.[5]
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You have explained wonderfully all scales and better than my textbook.
Amazing concepts on numbers. 💯
What an explanation awesome crystal clear explanation thank you sir....
Such a great clarity on the subject!
thank you! examples were very helpful.
Well explained
Thank you.
I'm really grateful for your explanations!
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This is so helpful. Thanks!
Very simplified and easy to understand. Thank you :)
Explained better than my university lecturer! Thanks!
Very simple and straight forward. TY!
Excellent explanations and examples! Thank you!
Great video. Better than the textbook. Thanks.
Thank you so much, I wish my teacher would explain it to me like this
thanks so much, it's really easy to understand
Excellent simplification. Thank you.
Really appreciate these videos.I feel a lot more confident about my statistics quiz on friday :)
excellent delivery
It was very understandable.thank you so much sir
love your content best video of scale
This video was really helpful
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Thank you soo much✨
Very clear and concise explanation. Well done.
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Thanks, Wagari! Please spread the word!
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Wonderful explanation
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Really helps. Thank you
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Great video, thank you so much
Thank you so much this was so helpful
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Thanks alot sir saved my time to understand the concept clearly.
Thank you so much!! Great video I understood the content very well!!!!
This is a great video. So with the comparison between interval and ordinal data in the race example, if we did have the timings, the race example would only become interval data if the timing of the placement were exact for example they came in 1st 2nd and 3rd exactly 5 seconds apart. However if 1st and 2nd were 5 seconds apart but 3rd was 10 seconds after then that would still be ordinal data? Thxx!!!
FANTASTIC
Such a good explanation. Way better than my book!
Thanks!
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which I have to retake next semester...
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Thank you 💙
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