How To...Calculate the Confidence Interval for a Sample

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  • Опубликовано: 24 дек 2024

Комментарии • 176

  • @mma_sap
    @mma_sap 2 года назад +88

    Just learned a whole month of class in this video right here.
    You really the man

    • @dtacherra6063
      @dtacherra6063 2 года назад +4

      its 1 week worth for my summer class.

  • @toni-anngayle5909
    @toni-anngayle5909 2 года назад +129

    Thank you so so so so so very much. I have been struggling with this for almost 2 hours. You made it so simple, and your video is so concise, yet so impactful.

  • @illianmckray6786
    @illianmckray6786 2 года назад +86

    My teacher who was trying to teach us this content had over an hours' worth of content that still failed to accurately explain how to do this, your video was so much more helpful, thank you!

    • @neerajbhardwaj2784
      @neerajbhardwaj2784 Год назад +4

      Don't underestimate that lecture, How many questions you can solve from 8 minutes of video as compared to 1hour long lecture?

    • @yiijung
      @yiijung 10 месяцев назад +3

      Don't compare it just the way you focus.

  • @rramos2020
    @rramos2020 Год назад +3

    I have been searching on how to solve this problem and you WERE able to break it down and i was able to follow without any problems. Thank you

  • @Bob50520
    @Bob50520 Год назад +3

    Beautiful and clean Eugene O'Loughlin. Wild how good that 6:58 min video was.

  • @PatoLorenz
    @PatoLorenz 5 месяцев назад

    I truly appreciate your by Hand video series. It has been incredibly useful in my studies

  • @aaa-uc6el
    @aaa-uc6el 2 месяца назад

    saved me 3 hours of lecture, what a hero

  • @kelseymills146
    @kelseymills146 2 месяца назад

    I have been struggling so hard in my statistics class (first math class in over 5 years), and feeling like I just can’t grasp any of these concepts. This has helped me understand so much, thank you so so much for the amazing lesson!

  • @EtherealEssenceCatalyst
    @EtherealEssenceCatalyst 2 месяца назад

    I'm back leaking for your stats guidance. With your teachings I passed stats at the community college. Now I'm at the university. I'm back for more assistance. Thank You for all you do. Sending infinite blessings.

  • @rabiulmallick8991
    @rabiulmallick8991 14 дней назад +1

    Extremely thank u sir❤

  • @alisonhesse8575
    @alisonhesse8575 7 месяцев назад +2

    THANK YOU SO MUCH!!!!! YOU JUST HELPED ME PASS MY FINAL!!!

  • @Livia.S
    @Livia.S 6 месяцев назад

    I had no clue on how to calculate this but after watching this video I can confidently say I will never fail this.

  • @xinhuacao338
    @xinhuacao338 Год назад +1

    Thank you. You manual calculation videos are really show the essence of statistics. I always use Minitab to analysis data, actually don't understand how to get the results. Your video helps a lot.

  • @frndssuchi
    @frndssuchi 3 года назад +50

    So much clarity and such a easy way to teach. Appreciate your teaching style so much. Thank you for these videos. Love and respect from India 🤗

  • @benjaminblankers4645
    @benjaminblankers4645 Год назад +1

    you explained it very clearly sir, thankyou!

  • @christineshavrnoch979
    @christineshavrnoch979 2 года назад +1

    You just explained it to me so that it “clicked” thank you for making this easy!!

  • @scotturbanski740
    @scotturbanski740 10 месяцев назад

    This has been so confusing and you made it so easy. Thanks!

  • @arlenecampbell3877
    @arlenecampbell3877 7 месяцев назад +1

    I thank you for making it so easy to understand.

  • @trevorpope1913
    @trevorpope1913 6 месяцев назад

    Thank you, your videos are excellent, it makes so much difference when you work by hand and explain why and how.

  • @mayrasingh-v1l
    @mayrasingh-v1l 3 месяца назад

    Great video! It's super easy to understand and you speak very clearly and at a good pace. Thank you!

  • @Valerie-yt9zj
    @Valerie-yt9zj 2 года назад +3

    Thank you so much for your help. Im in the middle of confusion and some how your way of teaching, talking and interpreting make me feel safe and calm. Like everything all have its solution. I know its sound rediculous but thanks again.

  • @deltax7159
    @deltax7159 11 месяцев назад

    your videos are always so straight to the point and helpful, thanks for everything you do.

  • @mitch6151
    @mitch6151 7 месяцев назад

    The teaching is so clear and great. Thank you!

  • @ukieeebeats725
    @ukieeebeats725 Год назад +1

    you're solid my guy

  • @siyungjung7162
    @siyungjung7162 28 дней назад

    Thanks a lot for your clear and detailed explanation.

  • @mikekorsak373
    @mikekorsak373 8 месяцев назад +1

    Your video was an excellent review - simple and succinct --- thank you!!!

  • @sumitnaik164
    @sumitnaik164 7 месяцев назад +1

    thank you. you explained it very simply...

  • @michaelpappas3857
    @michaelpappas3857 2 года назад +3

    Thank you Dr. O'Loughlin! Wonderfully clear explanation.

  • @maanavkapur9273
    @maanavkapur9273 4 месяца назад

    Concise, clear…what a guy

  • @jeenjoy7358
    @jeenjoy7358 2 года назад +3

    what if your degrees of freedom is 199? how do we find the values there?

  • @nathaliarocha6979
    @nathaliarocha6979 2 года назад +1

    I can’t believe I finally understand this, thank you so much!

  • @zeyadelhalaby5282
    @zeyadelhalaby5282 2 года назад

    thanks a lot I was struggling among many articles and stuff ..Bless you and healthy always

  • @collins0052
    @collins0052 Год назад

    Thank you so much😭 I’m doing my assignment right now and couldn’t understand the teacher that was supposed to teach me this. Thank you for such clarity in how it’s done.

  • @eleazararce5716
    @eleazararce5716 Год назад

    Great video and came in right on time! Let me see if I can get the right answers now.

  • @jessicasophiedouie2275
    @jessicasophiedouie2275 2 года назад +5

    This video explained this very clearly and made it so much easier. Thank you so much. You're an excellent teacher

  • @Bdiawu
    @Bdiawu День назад

    Great job sir. Thank you 🙏

  • @travistatman
    @travistatman 9 месяцев назад +4

    6:25 all of this is a great walk thru but the interpretation is incorrect. The correct interpretation is that for 95% of all random samples, the confidence interval will contain the population mean.

    • @abdulazeezolakunmi361
      @abdulazeezolakunmi361 4 месяца назад

      Absolutely, his interpretation is treating the population mean as if it were a random variable. But it is fixed.

  • @Rawennnnn
    @Rawennnnn 2 года назад +2

    Really helpful! How to calculate confidence intervals of variance (n under 30)?

  • @hectorsosa7687
    @hectorsosa7687 2 года назад +3

    This was soooo helpful! Thank you for posting it. I was so easy to follow

  • @alleahshane3345
    @alleahshane3345 8 месяцев назад +1

    what if it is not mean but a sample space, the sample space cannot be seen in degree of freedom. which is 47

  • @bigseekersb
    @bigseekersb 2 года назад +16

    I've seen other sources that state you can't estimate the mean with such a small sample size (n=14) unless you already know the original population data is normally distributed. That requirement was not mentioned anywhere in this video.

    • @diminarchy
      @diminarchy Год назад +2

      Isnt the t distribution for that? Wouldnt it be a z value for n>30 (im genuinely confused so pls weigh in lol)

    • @jabbedcrab
      @jabbedcrab Год назад +3

      @@diminarchy yes, that’s the exact reason why we use t-dist. We also don’t use T If we are given the population standard deviation.

  • @marynakshanovska344
    @marynakshanovska344 3 года назад +3

    Thank you so much, professor!!!

  • @mahiraamirova781
    @mahiraamirova781 2 года назад +2

    Excellent, professionallly, absolutely clear. Thanks. Let Allah Bless you

  • @erik9817
    @erik9817 Год назад

    Nice, and what if my T table only has one-tail?

  • @wong4728
    @wong4728 Год назад

    OK it is in, Teacher Extraordinaire. Thank you for this.

  • @ripbellx
    @ripbellx Год назад +1

    sir, you are a godsend. thank you so much for the informative but brief video!

  • @ryanakmal6411
    @ryanakmal6411 2 года назад

    One of the clearest explanation!

  • @TheWaites
    @TheWaites Год назад

    Amazingly explained - Thank you!

  • @serhatkoroglu6708
    @serhatkoroglu6708 2 года назад +1

    great narration thank you

  • @KhaLed-pb4pu
    @KhaLed-pb4pu Год назад

    @4:28 why do we multiply the SE with the T value? what is the mathematical reason? thanks!

  • @stephenf368
    @stephenf368 9 месяцев назад +1

    Thank you!

  • @inna1929
    @inna1929 2 года назад +6

    Thank you, Professor! You helped me out so much on this problem. Many thanks!

  • @celinemary2914
    @celinemary2914 2 года назад +1

    Compute for the minimum sample size using an appropriate formula. Assume that no similar study has been previously done and that the level of variability is unknown. Use 2% level of precision and 90% level of confidence. Could you please explain this to me sir!

  • @mohamid2k438
    @mohamid2k438 6 месяцев назад

    thank you so much for the help friend

  • @cuttingedgetechsongsmovies9662
    @cuttingedgetechsongsmovies9662 9 месяцев назад

    Two-tailed t distribution table was used, right?

  • @logesh5071
    @logesh5071 2 месяца назад

    thank you for the assistance, I will pass my exam because of you

  • @yvettestrandberg6267
    @yvettestrandberg6267 2 года назад +1

    Your videos are so very helpful Thank you very much again!

  • @nataliadejesus972
    @nataliadejesus972 Месяц назад

    Thank you very much for the explanation through this this video, it's really make me understand

  • @ABUBAKARRIBRAHIMKABIA-cs1nq
    @ABUBAKARRIBRAHIMKABIA-cs1nq 5 месяцев назад

    Thanks very much sir. You just save my day. I have an exam to write in an hour time. Thumbs up for this video👍

  • @englishaccentcoach7419
    @englishaccentcoach7419 10 месяцев назад

    Really it’s useful but why you multiply critical value with SE

  • @CometSpy
    @CometSpy Месяц назад

    Thank you, teacher!

  • @celinemary2914
    @celinemary2914 2 года назад

    I've learnt about finding confidence level after watching your video.

  • @pillainag5378
    @pillainag5378 4 года назад +1

    Fantastic teaching. Thank you

  • @jst7675
    @jst7675 2 года назад +1

    I watch this always if i forgot how to calculate lol ty dude btw

  • @viktormaximiliandistaturus7660

    good, so now i know how to calculate it, BUT why is it called confidence interval? it is just taking properties of my limited sample and multiplying it with bell curve properties to simulate that my data somehow magically is enough data so that i can reliably tell me by adding normal distribution properties mechanics, that it can tell me the chance that the populatin mean lies between these 2 values. sounds pretty daring. i have no clue yet ehy this works or should be true, and under which circumstances.

  • @nadinemaarouf4996
    @nadinemaarouf4996 Год назад

    thank you. how do we know when to use the t table vs z score?

  • @thilankavithanage1891
    @thilankavithanage1891 Год назад

    That was very clear. Thank you.

  • @Societyofknowledge
    @Societyofknowledge 2 года назад +1

    great video and easy to follow!

  • @khushbusubba1144
    @khushbusubba1144 4 года назад +17

    Your so cool, professor Eugene! love your teaching method, it's so easy to learn from you. Thank you so much. Respect.

  • @courtneygrant-xi4yc
    @courtneygrant-xi4yc Год назад

    YOU ARE AMAZING!!!!
    thank you so so much

  • @paulmckenna9927
    @paulmckenna9927 Год назад

    Easy to understand... at last. However, there are 4 results in the list of weights that are outside the CI range. 4/14= 28%. I thought that in a 95% CI range there would only be a 5% chance of having a result outside of the range

  • @MunirAhmad-sv7nd
    @MunirAhmad-sv7nd 2 года назад

    This is helpful . Thanks professor for this video . Comment is from Pakistan

  • @abetguerzon1939
    @abetguerzon1939 Год назад

    why is it when im doing the math at 95% CI it does'nt match with my excel curve Area result.. it yields around 75% only when im estimating the sigma values to plot the normal dis curve.

  • @frielruambil6275
    @frielruambil6275 6 месяцев назад

    Thanks alot you just helped me to answer my assignment questions 👏

  • @Graanvlok
    @Graanvlok Год назад

    Why do we indicate the t values on the curve? Shouldn't we be indicating the upper and lower limits (i.e. in this case 992.95 and 999.47) there instead?

  • @veerakanneboina8086
    @veerakanneboina8086 9 месяцев назад

    What does this +/- in confidence interval formula accounts for.

  • @aditya4974
    @aditya4974 3 года назад +2

    Perfect explanation! Thank you so much

  • @zachhutchison5574
    @zachhutchison5574 2 года назад

    your voice reminds me of the youtuber great scott, good video though very easy to follow

  • @thinkingahead6750
    @thinkingahead6750 Год назад

    Thank you that was very clear. I am trying to understand what it means when someone says something like "that is one standard deviation out" when talking about outliers in a population. I heard it in relation to the distribution of IQ results and the challenges faced by people with an IQ at a certain (low) level?

  • @SweetDamolaShekoni
    @SweetDamolaShekoni Год назад

    You are the best professor

  • @nthabisengnathalie1135
    @nthabisengnathalie1135 Год назад +1

    This was very much helpful, thank you.❤️

  • @euanb2748
    @euanb2748 2 года назад

    I watched another video on confidence intervals and instead of using a T table the guy used a Z score table.... when do you know which one to use???

  • @gabrielareyesreid6737
    @gabrielareyesreid6737 Год назад

    Genius! Thank you so much

  • @antoniopanoflo123
    @antoniopanoflo123 2 года назад

    ...and this is a confidence interval from only one sample, correct? No bootstrapping because that would be too long of a process, correct?

  • @kaylakai
    @kaylakai Год назад

    very useful, explained very well, thank you!!!!!

  • @mayrasingh-v1l
    @mayrasingh-v1l 3 месяца назад

    Great Video!

  • @shabnamrahman7410
    @shabnamrahman7410 8 месяцев назад +1

    how SD came as 5.5

  • @JoseFernandez-qt8hm
    @JoseFernandez-qt8hm Год назад

    so, any sample values above 999.47 and below 992.95 are rejects????

  • @nataliekay5566
    @nataliekay5566 2 года назад

    This video was so so helpful youre the best

  • @jasonmiller4490
    @jasonmiller4490 Год назад

    RUclips professors trump normal professors any day of the week, thank you for the great video

  • @tharunnl7810
    @tharunnl7810 Год назад

    if the sample size is more than 30 should we refer Z table rather than T table?

  • @stanley510
    @stanley510 Год назад

    this is the best work❤

  • @AngelAdeniji
    @AngelAdeniji Год назад

    this video REALLY helped thx

  • @ernestol6325
    @ernestol6325 4 года назад +2

    Thanks, professor! love the style and comes across easy to understand!

  • @michaelrussi9209
    @michaelrussi9209 4 года назад

    Thank you very much Professor Eugene!!

  • @smr0018
    @smr0018 Год назад

    Very helpful, thank you so much.

  • @theearthling8178
    @theearthling8178 Год назад

    Thank you very much! Was very helpful.

  • @abby_plascencia7297
    @abby_plascencia7297 Год назад

    Thanks for help! This video helped me so much more than my professor!! Keep up the great work Sir 😀

  • @Baljindersingh-nb9jy
    @Baljindersingh-nb9jy 2 года назад

    Very clear explanation. Thanks

  • @prasadsawant4153
    @prasadsawant4153 Год назад

    Hello! What if the df value is 94? How will you find the T-value?