Normal Distributions, Standard Deviations, Modality, Skewness and Kurtosis: Understanding concepts

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  • เผยแพร่เมื่อ 30 ม.ค. 2025

ความคิดเห็น • 267

  • @shadexdemarr
    @shadexdemarr 10 ปีที่แล้ว +29

    As an instructor myself I wanted to commend you on your ability to explain a difficult concept without talking over the listener's head. So many videos get so caught up in the math and details they often forget how important it is sometimes to simply explain what's going on in terms anyone can understand.

  • @angelineallaire7073
    @angelineallaire7073 6 ปีที่แล้ว +7

    As a novice to Statistics your ability to educate by captivating the learner is a tremendous skill set not found in many instructional videos! THANK YOU, and well done!

  • @Tramadoon
    @Tramadoon 4 ปีที่แล้ว +7

    Thanks for the video. Lepto means narrow (or thin) in Greek. Platy means wide. Just thought I'd throw that out there in case it's useful to anyone.. thanks again for the video!

  • @keishawhite349
    @keishawhite349 9 ปีที่แล้ว +13

    These are very clear and simple descriptions for very mud-like processes! Thanks so much. I am going to share with my Ed.D. Ed Leadership cohort. You rock!

  • @Samira.Khademrad
    @Samira.Khademrad 2 หลายเดือนก่อน

    I’m a master student and I finally understand this part of statistics with your fantastic teaching method. I wish I had found you sooner.

  • @mendicant1981
    @mendicant1981 3 ปีที่แล้ว +9

    you basically summed my two hour lecture into a five minutes video whilst also making it very simple to understand. thank you!

  • @albertroches7216
    @albertroches7216 9 ปีที่แล้ว +1

    Thanks very much from Belize. Short and to the point, but very effective. Never seen so much info presented so clearly in such a short time. Thanks again and great work.

    • @NurseKillam
      @NurseKillam  9 ปีที่แล้ว

      Thanks :) ... It definitely takes some effort to accomplish that.

  • @sweetsixtyn4402
    @sweetsixtyn4402 ปีที่แล้ว

    This is the best explanation I've found on TH-cam. Thank you!

  • @praisethesun9434
    @praisethesun9434 4 ปีที่แล้ว +1

    Thank you. I have been searching for a good video on distribution curves and this is the best one. It answered all my questions. Much appreciated

  • @biafgaspar
    @biafgaspar 4 ปีที่แล้ว +3

    It is important to highlight that the Kurtosis they mention in the video is the so-called "excess kurtosis" which has the value of 0 in the case of a Normal Distribution. Kurtosis, on the other hand, is 3.

  • @keishacarr3063
    @keishacarr3063 6 ปีที่แล้ว +2

    Definitely one of the best simplified mini lessons for statistics!

  • @pamvera
    @pamvera 10 ปีที่แล้ว +4

    This video is the first on the subject to really help me understand. Thank you for the clear explanation :)

  • @JayGhiyaGoogle
    @JayGhiyaGoogle 6 ปีที่แล้ว +1

    This one is quite helpful and understands concepts from a visual perspective. Kudos to @Nursekillam

  • @rmcginnis8157
    @rmcginnis8157 4 ปีที่แล้ว +1

    Thank you!! Just started my doctoral program and needed some further assistance!!

  • @shanehixson1313
    @shanehixson1313 4 ปีที่แล้ว

    Just what I needed. good clear explanations. good audio, good visuals. Keep up the good work.

  • @catirerubio
    @catirerubio 5 ปีที่แล้ว

    Statistics is still beyond confusing but this video helps. No longer dazed and confused, just confused. Thanks for making it.

  • @counselorchandru
    @counselorchandru 8 ปีที่แล้ว +7

    Wow can I adopt you as the stats teacher character in my life? You explained that articulately! :D

  • @awekemoges7317
    @awekemoges7317 3 ปีที่แล้ว +1

    professionally simplified, as a step towards heading to the complex understanding. Great!

  • @NurseKillam
    @NurseKillam  10 ปีที่แล้ว +26

    I'm happy you liked it

    • @bmpatel1281
      @bmpatel1281 10 ปีที่แล้ว +1

      Thanks

    • @NurseKillam
      @NurseKillam  7 ปีที่แล้ว +1

      +Josh Uddin yes. I'm a nurse and teacher.

    • @zahidhasan1175
      @zahidhasan1175 6 ปีที่แล้ว +1

      thank you ma'am it was very helpful for me :-)

  • @siannix07
    @siannix07 9 ปีที่แล้ว +4

    . very nice .. i was absent during our class discussion regarding this topic . and it's our exam tomorrow .. and i think i can pass. thanks for this ..

    • @frostice961
      @frostice961 5 ปีที่แล้ว

      I know this is too late but uh. Did you pass?

  • @mdshahshahi8634
    @mdshahshahi8634 6 ปีที่แล้ว

    This is really great. So much information in such short video with such clarity.

  • @HabibBector
    @HabibBector 7 ปีที่แล้ว

    Wish me good look for my Exam at 9.30AM and its already 3AM.
    Your content is really helping.
    Have not attended a single class for the subject. Wish me luck guys.

    • @NurseKillam
      @NurseKillam  7 ปีที่แล้ว +1

      Good luck! In my opinion attendance does not equal learning .... hopefully you were able to learn in other ways.

  • @nensikanackica
    @nensikanackica 8 ปีที่แล้ว +5

    I love how u explained it so simply! thanks

    • @NurseKillam
      @NurseKillam  8 ปีที่แล้ว +2

      +Nena Miodrag you are welcome. That was my goal :)

  • @6clonedcows
    @6clonedcows 10 ปีที่แล้ว +3

    3:24 I'm pretty sure the reason why we have more positive skews than negative skews is because the majority of the numbers we work with are non-negative, meaning there's a lower bound, i.e. 0, but no upper bound. For example, if you're measuring the amount of time it takes for someone to take a test without time limitations, it's likely that there are going to be outliers, people who take a really long time.

    • @halimselim6743
      @halimselim6743 3 ปีที่แล้ว

      interesting view, cleared my mind thanks

  • @RiaaXaine
    @RiaaXaine 7 หลายเดือนก่อน

    THANK YOU!! FINALLY SOMEONE EXPLAINED WHAT THE KURTIC'S LOOK LIKE

  • @Tracey74R
    @Tracey74R 6 ปีที่แล้ว

    Thank you so very very much! You helped me to identify with kurtosis because the reading was too much in my texts.

  • @youngadultsuis
    @youngadultsuis 8 ปีที่แล้ว

    Thanks very much NurseKillam. I was struggling to understand the concept of kurtosis. Yours is the best video I've seen!!!! :)

  • @dadangsudrajat68
    @dadangsudrajat68 4 ปีที่แล้ว

    It's really helping our students coz it's a very simple and clear explanation, thank you so much.

  • @samuelmcgill4110
    @samuelmcgill4110 6 ปีที่แล้ว

    Very simplistic, thank you, anyone could follow specially for a beginner like me.

  • @TesserHedron
    @TesserHedron 8 ปีที่แล้ว

    Your videos and explanations are very good. Thanks for putting this up.

  • @guptaachin
    @guptaachin 6 ปีที่แล้ว

    Precise, to the point and complete.

  • @elsanto8505
    @elsanto8505 9 ปีที่แล้ว +10

    Thank you for your time. It's a valuable information that it helps me with my class.

    • @NurseKillam
      @NurseKillam  9 ปีที่แล้ว +1

      +Charles Spurgeon So good to hear

  • @heetgorakhiya2242
    @heetgorakhiya2242 7 ปีที่แล้ว

    Its Great! Helped me with the basic, but you should make detailed videos. I'd love it!

  • @chloe-mariek2488
    @chloe-mariek2488 8 ปีที่แล้ว +2

    Thanks for this basic, intuitive explanation :)

  • @neerjanglama
    @neerjanglama 5 ปีที่แล้ว +2

    Thank you. Your effort is highly appreciated

  • @subekshadahal1424
    @subekshadahal1424 6 ปีที่แล้ว

    Really great video tutorial. It is useful for beginner and expert as well.

  • @richardgordon
    @richardgordon 4 ปีที่แล้ว

    Really excellent explanation! Many thanks 🙏

  • @kunaladhikary4937
    @kunaladhikary4937 8 ปีที่แล้ว +8

    this video is very helpful for the beginner. thank you so much ma'm.

  • @samanthapikus3178
    @samanthapikus3178 7 ปีที่แล้ว

    Thanks.. Great video... You talk a little fast though, but you are clear and have a great voice.

  • @turkmura81
    @turkmura81 6 ปีที่แล้ว

    awesomely clear explanations

  • @sulthansk6444
    @sulthansk6444 4 ปีที่แล้ว

    Crystal clear explanation...

  • @youhenok
    @youhenok 10 ปีที่แล้ว

    NurseKillam you had a nice video, a superb one......1000likes goes to you...we need more about statistics as you did it

    • @NurseKillam
      @NurseKillam  10 ปีที่แล้ว

      Happy you liked it :)

  • @BLKWDWENT
    @BLKWDWENT 5 ปีที่แล้ว

    Nursekillam I legit love you!! your video is awesome!!

  • @brendalovelady
    @brendalovelady 10 ปีที่แล้ว

    Great explanation and easy to understand thanks for the visual.

  • @tiffanyl2899
    @tiffanyl2899 6 ปีที่แล้ว

    this is still helpful today. statistics midterm in 4 hours.

  • @subekshadahal1424
    @subekshadahal1424 6 ปีที่แล้ว +1

    Really simple and perfect expalanation.

  • @tnasucks1444
    @tnasucks1444 10 ปีที่แล้ว +1

    Thanks soooo much! Great Clarity, in your speech and in your presentation! Excellent!

  • @fawazkazeem9132
    @fawazkazeem9132 3 ปีที่แล้ว

    Thanks for the simplified Explanation 🙏
    Pls, how do we solve different problems concerning Skewness and Kurtosis?

  • @chewechishala3622
    @chewechishala3622 8 ปีที่แล้ว

    Precise and straight to the point! very heplful..thanks!!

  • @guuusha3699
    @guuusha3699 9 ปีที่แล้ว

    Thank you so much.you explain it in very clear manner.

    • @NurseKillam
      @NurseKillam  8 ปีที่แล้ว +1

      Awesome to hear! Thanks for watching and taking the time to let me know.

  • @angrypepecancer5205
    @angrypepecancer5205 8 ปีที่แล้ว

    Many thanks. :) Thought it would be better if you show us how to calculated the skewness and kurtosis. Its my topic to discuss.
    i have a report tomorrow about this. It help me allot. Thanks again.

    • @NurseKillam
      @NurseKillam  8 ปีที่แล้ว

      +Player Gabriel our students don't need to calculate it, which is why I didn't include it. Sorry!

  • @kidssharon
    @kidssharon 8 ปีที่แล้ว

    Very helpful!
    will be looking for other videos from you on Statistics~

    • @NurseKillam
      @NurseKillam  8 ปีที่แล้ว

      +Sharon T Thank you. I hope to make more soon. Is there anything you need in particular?

  • @arupnayak555
    @arupnayak555 4 ปีที่แล้ว

    Thank you. Your videos are helpful.

  • @SharafatAliPK
    @SharafatAliPK 2 ปีที่แล้ว

    Comprehensively explained

  • @DaRealTowStarr
    @DaRealTowStarr 7 ปีที่แล้ว

    Nice and simply put. Would anyone explain (In simple terms) what effect taking the natural logarithm of a scale that has a high kurtosis value.

  • @dr.mahmoodazadi6032
    @dr.mahmoodazadi6032 7 ปีที่แล้ว

    It was really helpful, easy to learn , Thanks a lot

  • @jurgenpeci6810
    @jurgenpeci6810 9 ปีที่แล้ว

    Thx so much for this explanation. Very clear and helpful.

    • @NurseKillam
      @NurseKillam  9 ปีที่แล้ว

      Awesome to hear. You are welcome :)

  • @HafizahHoshni
    @HafizahHoshni 6 ปีที่แล้ว +1

    Simply excellent. Very grateful for clear, concise and well presented video. Thank you for the great channel. 27/8/2018 😊

  • @Kebedia1
    @Kebedia1 9 ปีที่แล้ว

    Very helpful. It is short and clear

    • @NurseKillam
      @NurseKillam  9 ปีที่แล้ว

      I'm glad you liked it.

  • @hosseinrafiei6465
    @hosseinrafiei6465 5 ปีที่แล้ว

    Awesome presentation. So happy I watched the video. Thanks so much :)

  • @austinb3560
    @austinb3560 2 ปีที่แล้ว

    Thanks for simplifying this

  • @Yahmalichiah
    @Yahmalichiah 7 ปีที่แล้ว

    Thanks for this. I kept coming across these terms and just could not understand the 'fat tail' analogy!

  • @sumehcrew
    @sumehcrew 6 หลายเดือนก่อน

    I would like to know what it means when I have a positive or negative skewed of results.

  • @Ayuk1
    @Ayuk1 4 ปีที่แล้ว

    Great explanations. Thank you

  • @iuliaflorescu9070
    @iuliaflorescu9070 8 ปีที่แล้ว

    Very useful presentation! Thank you!

  • @redwhitegreen
    @redwhitegreen 9 ปีที่แล้ว

    Good video, very helpful.
    One correction, for central moment, Kurtosis of norm. dist. K=3
    So mesokurtic k=3
    Leptokurtic has K>3
    Playkurtic had K

    • @NurseKillam
      @NurseKillam  9 ปีที่แล้ว

      I'll go back and check my sources. Thanks.

  • @breannedewolf677
    @breannedewolf677 10 ปีที่แล้ว

    I loved the video, although it did feel a little rushed. Maybe slowing down just a little bit? The information was so amazing and well worded though! Thanks so much!

    • @NurseKillam
      @NurseKillam  10 ปีที่แล้ว

      Thanks for the feedback. Slowing down is my biggest challenge. It's hard to find a balance between boring and hyper-speed. Im naturally a fast talker. I'm happy you liked the content though :)

  • @TheSar818
    @TheSar818 6 ปีที่แล้ว

    Nice Video ! Keep up the good work !

  • @preludefugue4859
    @preludefugue4859 9 ปีที่แล้ว

    another question, if the mode = median = 0, and mean = 0.18 units, what does this distribution can be? skewed ?

  • @sintakristanti6108
    @sintakristanti6108 6 ปีที่แล้ว

    Very informative with all those figures, thank you so much!

  • @TheSevenofMine
    @TheSevenofMine 10 ปีที่แล้ว

    The video was very good, but I would have liked to get an explanation of excess kurtosis and its difference towards kurtosis as well.

    • @NurseKillam
      @NurseKillam  10 ปีที่แล้ว

      That would be a good topic for another video. This one was aimed at undergraduate students who don't really need that much detail. I'll add that to my ideas list and let you know if I come across any other videos that are well done.

    • @TheSevenofMine
      @TheSevenofMine 10 ปีที่แล้ว

      I'm an undergraduate student studying Forensics and I'm preparing for an exam in Measuring Techniques and Statistics (and yes, I think we're going into much more detail than would be necessary^^). I've understood the relevant difference now, but it would be great if you added it in another video :) thank you

  • @jacobmitchell85
    @jacobmitchell85 8 ปีที่แล้ว

    what about a non symmetrical bimodal graph, how would you decide if it is positive or negatively skewed?

  • @bilalalam9926
    @bilalalam9926 5 ปีที่แล้ว

    hi. very nice. but i hav problem with my research data that skewness touches -2 . can u help me out with this issue? and what does it mean

  • @zhandossalpynov
    @zhandossalpynov 6 ปีที่แล้ว

    Do you have any videos on the Survival analysis?

  • @kristania411
    @kristania411 7 ปีที่แล้ว

    holy moly, helps a lot! taking statistics online!!

    • @NurseKillam
      @NurseKillam  7 ปีที่แล้ว

      +Kristania good to hear

  • @donnalastica3108
    @donnalastica3108 6 ปีที่แล้ว

    Very good video. Thanks for posting it.

  • @leejohnson197733
    @leejohnson197733 2 ปีที่แล้ว

    how could i compare 2 graphs with similar info with a change to the median and deviation but compare the same gap on each graph ?

  • @Pufferfish28
    @Pufferfish28 6 ปีที่แล้ว

    Great information! Perfectly articulated, but personally I would like it if you could slow it down a tiny bit. :)

  • @JakeTorres0206
    @JakeTorres0206 8 ปีที่แล้ว

    Hi, your video is good..Can I use this one for my multi-media studies?

  • @ПавелСилаков-ф1л
    @ПавелСилаков-ф1л 8 ปีที่แล้ว

    if the kurtosis is leptokurtic, I am more likely to get an expected random variable than in the case of any other distribution, am I right?
    thanks!

  • @EyoAsuquo-gl2gh
    @EyoAsuquo-gl2gh ปีที่แล้ว

    So good at Statistics and you studied nursing. Wow.

  • @gergerger53
    @gergerger53 7 ปีที่แล้ว

    Nice video. I am just familiarising myself with the concepts so it was nice and conceptually clear, but also with a chance to learn some fancy terminology on the way :)

  • @bgbzero
    @bgbzero 7 ปีที่แล้ว

    What's the significance of leptokurtosis? Is it not good that most of the test scores are near the mean?

  • @mzcontaantiga
    @mzcontaantiga 8 ปีที่แล้ว

    Hi, great video! So when the distribution is said to have fat tails, that means it is Leptokurtic?

  • @smilebake111
    @smilebake111 8 ปีที่แล้ว

    thanks for such crisp information. i have one query.. if the values of mean=97.66, mode=98 and median is 97 then what will be interpretation about skewness? kindly reply

    • @NurseKillam
      @NurseKillam  8 ปีที่แล้ว

      You could calculate it but basically I'd say it is almost perfect (no skew). Nothing is perfect in real life.

  • @FluencyAccentCoach
    @FluencyAccentCoach 4 ปีที่แล้ว

    Explained well. Thank you.

  • @shrutishirke1533
    @shrutishirke1533 5 ปีที่แล้ว +1

    Thakyou.
    Can you discuss, different methods of sample size estimation. In your next video

  • @zhandossalpynov
    @zhandossalpynov 6 ปีที่แล้ว

    So good👍well done!

  • @hemalatha5442
    @hemalatha5442 8 ปีที่แล้ว

    very well explained....

  • @mharry87
    @mharry87 10 ปีที่แล้ว

    Thank you NurseKillam for the wonderful video.

  • @shubhamkmr900
    @shubhamkmr900 6 ปีที่แล้ว

    It helped me a lot. Thankyou .

  • @gaelmboussaanga8073
    @gaelmboussaanga8073 8 ปีที่แล้ว

    Well explained and thank you so much.

  • @LAGHRISSIAdnane
    @LAGHRISSIAdnane 3 ปีที่แล้ว

    جزاك الله خيرا، Thank you

  • @zeeshanismail1284
    @zeeshanismail1284 2 ปีที่แล้ว

    Doesn't it have to be 3(mean- median ) for skewness ?

  • @nknnithinabc
    @nknnithinabc 10 ปีที่แล้ว

    Thanks,ur explanation is simply superb

    • @NurseKillam
      @NurseKillam  10 ปีที่แล้ว

      I'm happy you liked it :)

  • @areejk6402
    @areejk6402 6 ปีที่แล้ว

    you made my life easier thank you!

  • @patwheeldn9555
    @patwheeldn9555 7 ปีที่แล้ว

    Fabulous explanation ... thank you!

    • @NurseKillam
      @NurseKillam  7 ปีที่แล้ว

      +Pat Wheeldn thank you for the compliment :)

  • @erksipa
    @erksipa 4 ปีที่แล้ว

    Thank you! Very well explained:)

  • @sukursukur3617
    @sukursukur3617 4 ปีที่แล้ว

    Why do we calculate standard deviation by using mean? Namely, why dont we use mode instead of mean?

  • @mohammadsaqib1400
    @mohammadsaqib1400 6 ปีที่แล้ว

    Your data set has missing values and is positively skewed with skewness = 1. Further examination tells you that they are spread along 1.5 standard deviation from the median. How much data would remain unaffected (Tell us the %). Why?