[R] Sample size required to estimate population variance

[Thomas Subia]

 Thanks for the suggestion but I'm not sure that it answers my original question.I need to know how many samples I need to collect to collect in order to estimate the sample size needed to achieve a specific margin of error for confidence intervals for the population variance. I'm not sure whether the pwr package does that.


    On Thursday, July 4, 2019, 4:31:44 PM PDT, John <jwd using surewest.net> wrote:  
 
 On Tue, 2 Jul 2019 22:23:18 +0000 (UTC)
Thomas Subia via R-help <r-help using r-project.org> wrote:

> Colleagues,
> Can anyone suggest a package or code which might help me calculate
> the minimum sample size required to estimate the population variance?
> I can do this in Minitab but I'd rather do this in R. Thomas Subia

You want to look into the capabilities of the pwr package.  This page
offers some information:

https://www.statmethods.net/stats/power.html

JWDougherty
  
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