How to calculate sample size and margin of error

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  • Опубліковано 10 гру 2024

КОМЕНТАРІ • 42

  • @statisticsfun
    @statisticsfun  11 років тому +4

    Tim Tam, I added a link in the video description on calculating sample size. Good luck and let me know if this does not help.

  • @vannahbethune
    @vannahbethune 7 років тому +28

    Why is the title "how to calculate sample size" when you had already found it in a previous video? that's why i clicked on this video so I could learn how to find the sample size. this was not helpful.

  • @statisticsfun
    @statisticsfun  12 років тому +1

    Ya know you are right! I did not realize that. I changed the title to "How to understand the relationship between sample size and margin of error" I did include links to how to calculate sample size in the video description. Thanks for the feedback because I am always trying to improve the navigation in UA-cam.

  • @statisticsfun
    @statisticsfun  11 років тому

    You are very welcome! Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

  • @statisticsfun
    @statisticsfun  11 років тому

    Josh, I added in some links in the video description of this video on how to calculate sample size.

  • @mydearfriendxox
    @mydearfriendxox 8 років тому +1

    Great video! Way better than my stats professor! I like how you put everything in a table and color coordinated it so it was very easy to follow along!

  • @statisticsfun
    @statisticsfun  11 років тому

    Great to hear! Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

  • @sai7sharmi
    @sai7sharmi 8 років тому +1

    Thank You so much for making the things so easy to understand..I basically had phobia to stats before watching your video...Thank you once again

  • @statisticsfun
    @statisticsfun  11 років тому

    I am not sure I understand the question, but in this case you should know the sample size.

  • @Applecheria
    @Applecheria 11 років тому

    That's exactly what I was trying to find out.
    Determining the sample size. Use the given data to find the minimum sample size required to estimate a population proportion or percentage.
    Margin of error: two percentage points, Confidence Level: 99%; P hat is estimated by the decimal equivalent of 14%

  • @janekogi6442
    @janekogi6442 8 років тому

    Hey. I really love the video. please give a series of neorophysiology

  • @MMAinTune
    @MMAinTune 10 років тому +2

    how did you get 1.96 to use in the calculation for margin of error, and what does 1.96 stand for?

    • @LynchFamDWEm
      @LynchFamDWEm 5 років тому

      1.96 is the z score for a 95% confidence level.

  • @saaneroa5024
    @saaneroa5024 9 років тому

    Many thanks for explaining this process in a simple and easy way to digest. Awesome

  • @somcana
    @somcana 6 років тому

    I completley understand you. what is a suitable sample size to fit criteria is n=30 enough? where is the critical sample size where my research is affected.

  • @KongHeiPatJoy
    @KongHeiPatJoy 7 років тому

    Where did the mean came from? Is it a constant as well?

  • @BlackBNimble
    @BlackBNimble 7 років тому

    @statistics for fun, In correlation work, when the sample size decreases, does the size of the correlation that is needed to reach statistical significance; increase, decrease or stay the same?

  • @mhatung
    @mhatung 11 років тому

    I firgured it out. You can figure out the sample size with a different equation even if you dont know SD

  • @Killary-Klinton
    @Killary-Klinton 11 років тому +1

    So how do you actually calculate the sample size ?

  • @salsabillashafaadzra8109
    @salsabillashafaadzra8109 3 роки тому

    Hi sir, can we use margin error 7% and is there any journal that refers it? Thank you

  • @chriscollins5320
    @chriscollins5320 9 років тому

    Well done. Thank you for the easy and methodical way that you taught this.

    • @statisticsfun
      @statisticsfun  9 років тому

      Chris Collins You are very welcome Chris. Thanks for taking the time to let me know my videos are helpful. If you get a chance like, share the videos (and www.Facebook.Com/PartyMoreStudyLess). This will help others find the videos.
      Good luck in your studies too.

  • @michaelbermejo5030
    @michaelbermejo5030 7 років тому

    What is the formula if the required is population and the given is sample size and marginal error only.

  • @Abdiko99
    @Abdiko99 11 років тому

    I think this is helpful ... but I'm not statistics student and just I need very basic knowledge about it. I thought confidence interval and margin of error are similar

  • @claytrell
    @claytrell 5 років тому

    What is the margin of error for predicting an outcome if my sample size is .00000005%? It seems like this should be much easier to calculate than what is going on here.

  • @tomgreene8480
    @tomgreene8480 8 років тому

    Suppose the sample size is constant but the probabilities change??

  • @tyahmacon6834
    @tyahmacon6834 8 років тому +1

    How did you get 1.96?

    • @srhaman08
      @srhaman08 8 років тому +3

      From Confidence level chart,
      90 % = 1.645
      95% = 1.960
      99% = 2.327

    • @HTG4537
      @HTG4537 7 років тому +1

      In order to get the Z-score (1.96) I used the Excel function =-NORM.S.INV(0.025). you get the 0.025 from 95%. There will be 0.025 tailing on each end totaling to 5%. in other words it is (1-.95)/2. (the .95 comes from your confidence Interval.) there are dozens of online calcs that can give you the Z- value, becuase it is all based on the probability that you choose.

  • @syannameer972
    @syannameer972 11 років тому

    in this video N is known, what about if I dont know how to calculate the sample size N for my study? there are a lot of formulas and so confusing !!!

  • @salomluvinga8850
    @salomluvinga8850 Рік тому

    Thank u so much. I am going to write stats b summer exam

  • @anitaputrikusuma1409
    @anitaputrikusuma1409 3 роки тому

    this is very helpful, thanks!

  • @mhatung
    @mhatung 11 років тому

    so what if you dont know the sample size?

  • @anthonyhawkins6138
    @anthonyhawkins6138 11 років тому

    Thanks for clarifying statistics!

  • @amitsharma-qt5sm
    @amitsharma-qt5sm 9 років тому

    thanks sir..its eazy and important

  • @Rayskydude
    @Rayskydude 6 років тому

    I love this !

  • @samibangash5296
    @samibangash5296 3 роки тому

    NyC.,.

  • @Abdiko99
    @Abdiko99 11 років тому

    OK great, tnx a lot

  • @jakewalter613
    @jakewalter613 8 років тому +21

    what if you don't have the sample size?