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.

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!

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.

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

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

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

what if you don't have the sample size?

@jungwonyang3399

3 жыл бұрын

Oemgi I am finding problems like this

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 KZread.

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

@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?

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

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

@statisticsfun

9 жыл бұрын

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.

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.

Thanks for clarifying statistics!

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

@LynchFamDWEm

5 жыл бұрын

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

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

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%

I love this !

this is very helpful, thanks!

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

So how do you actually calculate the sample size ?

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

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

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

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

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.

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

thanks sir..its eazy and important

@statisticsfun

9 жыл бұрын

amit sharma You are welcome.

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 !!!

How did you get 1.96?

@srhaman08

7 жыл бұрын

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

@HTG4537

6 жыл бұрын

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.

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

so what if you dont know the sample size?

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

OK great, tnx a lot

NyC.,.