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# 20: Sample Size for a Mean Calculator


Sample size Calculator

Fill in the population standard deviation ($$\sigma$$), the error bound (E), and the confidence level (CL).  Write the confidence level as a decimal.  For example, for a 95% confidence level, enter 0.95  for CL.  Then hit Calculate and assuming the population is normally distributed, the necessary sample size will be shown.

 $$\sigma$$: E: CL: n:

(Desmos)

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20: Sample Size for a Mean Calculator is shared under a CC BY license and was authored, remixed, and/or curated by Larry Green.

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