Calculate Sample size using calculator ?

#1
Hello
Can some one give me formula to calculate sample size using calculator or manually.


This data I have right now:

Population size = 500

Confidence level = 95%

Margin of error = 5%


It would be perfect if someone use my data in formula so I can how it been used
 
#3
It is a test to determine number of people you need to test in order to generalize the population , I find a calculator online and it give me exactly 217 sample size.

Unfortunately I check other sites, youtubes, it is difficult to follow how they are calculating the sample size.

How can I get the same output in the picture but manually ?
 
#5
It is a test to determine number of people you need to test in order to generalize the population , I find a calculator online and it give me exactly 217 sample size.

Unfortunately I check other sites, youtubes, it is difficult to follow how they are calculating the sample size.

How can I get the same output in the picture but manually ?
I think the online calculator that you found is using the equation that can be found in the attached link:

http://www.research-advisors.com/tools/SampleSize.htm