SIX SIGMA Glossary: Sample Size with Confidence Intervals

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:: Home ::Six Sigma ::SIX SIGMA GLOSSARY: Sample Size with Confidence Intervals

Sample Size with Confidence Intervals

The sample size to achieve a confidence interval of width 'ω', can be calculated from:

where:

Z_α/2	z statistic for the confidence level
ω	confidence interval
σ	process standard deviation

Analytical and descriptive statistics are covered in the MiC Quality online course Primer in Statistics.

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