How to calculate sample size and margin of error

In this tutorial I show the relationship between sample size and margin of error. I calculate the margin of error and confidence interval using three different sample sizes. As the sample size increases the margin of error goes down.

Related Videos on Sample Size:

[vannahbethune]

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.

[jakewalter]

what if you don't have the sample size?

[statisticsfun]

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.

[statisticsfun]

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 Youtube.

[statisticsfun]

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

[mydearfriendxox]

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!

[saisharmi]

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

[MMAinTune]

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

[Killary-Klinton]

So how do you actually calculate the sample size ?

[somcana]

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]

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

[claytrell]

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

[BlackBNimble]

@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?

[janekogi]

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

[saaneroa]

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

[michaelbermejo]

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

[salsabillashafaadzra]

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

[chriscollins]

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

[statisticsfun]

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

[tomgreene]

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