For conventional formulas for calculating a minimum required sample size, you don't need to know (or even estimate) a population size, since the point is to have a sample large enough to normalize the sampling distribution. (If those last seven words doesn't make sense, you should hesitate to make inferential claims from your data.) But you do need to assume a randomly selected sample, and if the surveys are "handed {sic} out" via four online routes, it definitely won't be. :)

-----Original Message----- From: Air-L <air-l-bounces@listserv.aoir.org> On Behalf Of Matt Erlandsen Sent: Monday, July 6, 2020 10:06 AM To: air-l@listserv.aoir.org Subject: [Air-L] How to calculate survey sample size for multiple social media platforms?

Hello everybody,

Hopefully you are all safe and sound.

I need to conduct an online survey, which will be handed out through Facebook, Twitter, Instagram, and the website of a local online newspaper.

My objective is to reach their audience as a whole, yet I am confused and lost about how to calculate the survey sample size having in consideration that:

1) There are fans from Facebook and followers in Instagram who are the same person (but of course I cannot match them to filter them out);

2) What number should I use as a population in order to calculate the sample size --i.e Facebook fans, Twitter followers, Instagram followers, web page visitors, or a sum of all of those, an average of all of those, should I calculate and therefore run one survey sample size for each platform/source?

If you could give me any input/feedback on this I will be very glad.

Thanks a lot.

*Matt Erlandsen* *Estudiante Doctorado en Ciencias de la Comunicación* *PhD Student of Communication Sciences* Pontificia Universidad Católica de Chile +56 (9) 8218-5055 @matterlandsen <https://urldefense.proofpoint.com/v2/url?u=http- 3A__twitter.com_matterlandsen&d=DwIGaQ&c=Oo8bPJf7k7r_cPTz1JF7vEiFxvF RfQtp-j14fFwh71U&r=GkVr_WnzKhJSEnJfRRWR3pxvkEQQVBgue- uUa05rcls&m=HV40CHY1yqwbJOgr2vDAsnsRM5EBQ3SVRnmG6Zb0DWg&s=ZCf_ 6J5uVOYudQ0KNv1k0QqfCWdwNb-eMfw5iPjl9bM&e= > Santiago, RM, Chile.-

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