How To Calculate The Sample Variance | Introduction to Statistics

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  • Опубліковано 11 лис 2024

КОМЕНТАРІ • 75

  • @Doingmybest700
    @Doingmybest700 2 роки тому +146

    Taking stats for the first time and I want to cry lmfao

    • @Learn2Stats
      @Learn2Stats  2 роки тому +7

      Let me know if you have any questions. I use to teach Intro/Business Statistics.

    • @Doingmybest700
      @Doingmybest700 2 роки тому +4

      @@Learn2Stats Thank you! Will do. I will be binge watching your vids this weekend

    • @Learn2Stats
      @Learn2Stats  2 роки тому +6

      @@Doingmybest700 if I don't cover something and you need an explanation, leave a comment and I will put a video together. If you need it asap, I will respond to the comment when I see it and make the video after.

    • @Doingmybest700
      @Doingmybest700 2 роки тому +2

      @@Learn2Stats Will do, thank you so much!!

    • @amnalodhi587
      @amnalodhi587 Рік тому +5

      Dude my seniors said u can pass stats without studying 😭😭 i'm crying with you

  • @nickyjsab8396
    @nickyjsab8396 Місяць тому +6

    thank you for explaining this SO much better than my teacher. He was moving so fast throughout the lesson, I thought I would possibly fail the subject.

    • @Learn2Stats
      @Learn2Stats  Місяць тому +1

      I used to teach it in Grad school.
      I have plenty of Intro to Statistics videos.
      I'm glad I was able to help.

  • @Adam-de8yi
    @Adam-de8yi 11 місяців тому +15

    I WANT TO CRY THANK YOU !!! Will share your channel with my peers.

    • @Learn2Stats
      @Learn2Stats  11 місяців тому +2

      No problem.
      Don't be afraid to ask any questions.

  • @leahphyfer2139
    @leahphyfer2139 6 місяців тому +17

    thank you for not explaining this like its common knowledge!!

    • @Learn2Stats
      @Learn2Stats  6 місяців тому +3

      No problem.
      I used to teach Intro to Stats when getting my graduate degree and found that the process isn't well known.
      A lot of my videos are from those experiences because unfortunately a lot of teachers assume too much, even when they are the ones that are suppose to break it down for the students.

  • @RekiaBrown
    @RekiaBrown Рік тому +9

    I was kind of skeptical of using this method because, my stats professor has been using the computational method instead. However, after watching this video (literally twice) i'm now able to correctly solve the problems. Thank you so much!

    • @Learn2Stats
      @Learn2Stats  Рік тому +1

      These are the comments I love to see.
      I am very glad I could help you.

  • @samthemessiah9330
    @samthemessiah9330 9 місяців тому +3

    Taking my first statistics class ever right now and its all online. Your videos have been so much more helpful than my own professor. Thank you for making these you're actually saving me from failing this class

    • @Learn2Stats
      @Learn2Stats  9 місяців тому

      I'm glad to help.
      I used to teach Statistics courses at a university and tutor. A lot if these come from those experiences.
      Let me know what other topics you want help on. It doesn't take long to make these videos.

  • @ezekiahgidehreyes7133
    @ezekiahgidehreyes7133 Рік тому +3

    Underrated channel

  • @dr.nebertbwalya9429
    @dr.nebertbwalya9429 Рік тому +5

    Super straight forward and easy. Thank you

  • @art_kitty_1190
    @art_kitty_1190 Місяць тому +1

    This was very helpful, thank you. I literally am cramming for my ecology exam 2 hours from now 😅 wish me luck

  • @ShreyaChoudhuryMusic
    @ShreyaChoudhuryMusic 2 місяці тому +1

    I really found the step-by-step instructions to be helpful for me in prepping for my fifth quiz. I'm currently taking an, "Introduction to Statistics," course right now and we are learning about standard deviation and sample variance. I would like some tips on how to memorize the formulas for both of these, so that I can continue to use those as references be it when preparing for future quizzes for the course or taking the quiz alone. If there are videos on that matter, that would be great. Thanks again!

    • @Learn2Stats
      @Learn2Stats  2 місяці тому

      I'm glad it helped.
      The big thing for SD and Variance is when sample or population is said in front of it.
      N-1 in the denominator is the sample calculation, N in the denominator is the population calculation.
      I have other videos on those two differences and explain the different notations for them as well, Statistics vs Parameters is the name of that video.

  • @belaynewa8003
    @belaynewa8003 4 місяці тому +1

    Easy and brief explanation thanks

  • @ashleighross5063
    @ashleighross5063 8 місяців тому +4

    Thank you for this video. I havent done maths in about 6 years. I was close to pulling my hair out before I found your video. My textbok has a different method which is confusing for me. I will be using your channel to help me ace my module. Thank you, thank you, thank you. 🙏🙏🙏

    • @richardmoreno4052
      @richardmoreno4052 8 місяців тому +1

      Same here I’ve been out of school since 2019 and now that I’m back I went straight into stats and I’m out of my comfort zone but still thinking positive

  • @merryalvi6726
    @merryalvi6726 2 роки тому +2

    Because this video is more effective for me and me easily understand the this topic.

  • @sheilarodriguez2317
    @sheilarodriguez2317 7 місяців тому +1

    This was so helpful, I am struggling in stats

    • @Learn2Stats
      @Learn2Stats  7 місяців тому +1

      A lot of my channel has Intro to Stats clarifications like this, I used to teach the course.

  • @paigenichols3962
    @paigenichols3962 Рік тому +1

    This video really helped me understand. Thanks

  • @MsFefe-wh4wt
    @MsFefe-wh4wt Рік тому +1

    Your method is awesomely great!

  • @shacybroussard1069
    @shacybroussard1069 4 місяці тому +1

    This helped so much thank you

  • @NahomBerhanu-g2p
    @NahomBerhanu-g2p 9 місяців тому +3

    Thank you sir 🎉🎉 I never understood this better keep up the great work ❤

  • @horunrahmatullayev
    @horunrahmatullayev Рік тому +1

    You helped so much

  • @samtheham1280
    @samtheham1280 9 місяців тому +1

    thank you king!!!

  • @BusiswaMkhwanazi
    @BusiswaMkhwanazi 4 місяці тому +1

    Thank you ❤❤❤

  • @P-I-N-G404
    @P-I-N-G404 4 місяці тому +2

    Cool bro ,i came for JEE mains revision lol😂😂😂

  • @premaghosh86
    @premaghosh86 Рік тому +1

    Thanks a lot ❤

  • @AshleyReyes-ug1vc
    @AshleyReyes-ug1vc 2 місяці тому +1

    Hello, I see that the final answer was 19.333 however, when done through the calculator, there are many more threes. I'm really just confused about where you know to cut off the number? Numbers have never been my thing and I'd appreciate some clarification.

    • @Learn2Stats
      @Learn2Stats  2 місяці тому +1

      That's a good question.
      Usually, teachers will let you know how many numbers after the decimal.
      If they don't, stopping after 2 is a good default.

  • @aizacamado7730
    @aizacamado7730 Рік тому +2

    wow it really amazing thank for this I was so struggle this before but now i found that I love numbers 😅

  • @DavidTorres-ze3ch
    @DavidTorres-ze3ch 8 місяців тому +1

    how do you know whether to use N or μ- 1

    • @Learn2Stats
      @Learn2Stats  8 місяців тому

      Sample Variance = n-1
      Population Variance = N

  • @mgmgmgmg500
    @mgmgmgmg500 27 днів тому +1

    whats x what the bar over it ?

  • @merryalvi6726
    @merryalvi6726 2 роки тому +2

    Sir plz upload video About next topic of Sampling distribution of S^2 .
    in which we make the sample and then find the sampling distribution of S^2

  • @trinityyyyyyyyyy02
    @trinityyyyyyyyyy02 Рік тому +2

    Could you please explain the third step

    • @Learn2Stats
      @Learn2Stats  Рік тому

      The third step is the equation with the top part calculated and the bottom part calculated.

    • @trinityyyyyyyyyy02
      @trinityyyyyyyyyy02 Рік тому +1

      Ohh okay thank you sm❤️

  • @yuliaaaaaaaaaaa
    @yuliaaaaaaaaaaa 11 місяців тому +1

    where did you get the 4

    • @Learn2Stats
      @Learn2Stats  11 місяців тому +1

      That's how many numbers, also known as observations, that are used in the calculation.

  • @ashleighross5063
    @ashleighross5063 8 місяців тому +1

    What does the "i" mean? It's on the right of "x" in the equation

    • @Learn2Stats
      @Learn2Stats  8 місяців тому

      Xi represents all iterations of x.
      It is a way of having two letters represent several numbers.
      Later in the video, I go to show each number is subtracted by the mean, xi is the "each number" part.

    • @ashleighross5063
      @ashleighross5063 8 місяців тому +1

      Ah I see. Thank you!😊

  • @Jesse_Scoccimarra
    @Jesse_Scoccimarra Рік тому +1

    This video helped a lot, thanks

  • @eastsidesun4650
    @eastsidesun4650 2 роки тому +1

    do you round the mean or keep it the same ?

    • @Learn2Stats
      @Learn2Stats  2 роки тому

      Keep the mean what it is throughout the calculations. If you round before, the finally answer may be too far off.

    • @eastsidesun4650
      @eastsidesun4650 2 роки тому +1

      @@Learn2Stats thank you!

  • @Learn2Stats
    @Learn2Stats  3 роки тому +4

    Support the channel and purchase from Amazon through this link with no cost to you: amzn.to/43PwRLN

  • @Areeba_Arooj
    @Areeba_Arooj 21 день тому

    What if sample size is 2 ??

    • @Learn2Stats
      @Learn2Stats  21 день тому

      You can still calculate it but the n=2.

  • @pr1n05
    @pr1n05 9 місяців тому

    My homework keeps telling me to use excel… i keep getting it wrong no matter i try this method please help…

    • @Learn2Stats
      @Learn2Stats  9 місяців тому

      Can you post the numbers and what you get?

  • @OscarChimba-n4s
    @OscarChimba-n4s 3 місяці тому

    Don't we supposed to square root the s squared

    • @Learn2Stats
      @Learn2Stats  3 місяці тому

      That's for the standard deviation.

  • @ImeldaBugtas
    @ImeldaBugtas 8 місяців тому

    How you get 19.333 i cant get it

    • @Learn2Stats
      @Learn2Stats  8 місяців тому

      58/3 is the fraction for it. I walk through how I got the numbers to put into the formula to get 58/3.

  • @ethanfisher9675
    @ethanfisher9675 Місяць тому +2

    I f*****g love you

  • @bryanrodriguez9226
    @bryanrodriguez9226 Рік тому +2

    I had 9 numbers I kept getting the number that was close to the answer but couldn’t get it I kept getting 76. …. But the right answer was 77.44 after I realized I kept dividing my answer 9-8 I noticed when I was doing the n-1 I looked back counted the numbers and I realized I forgot to add another number so all this time I was subtracting and adding only eight numbers and not 9 but yeah took me an hour to realize this but thank you for your video it helped me alot