Cochran Formula For Unknown Population. Formula For Sample Size For The Mean. L Ey E L WhYh w yh hl hl snce the estimates are unbiased in individual strata.
The two main advantages of sampling are the faster data collection and lower cost. Y PN i1 Y i. The population is Y 1Y Nwhere Y iis a numerical value associated with i-th element.
The formula is by Cochran and this is the calculation.
The Cochran formula allows you to calculate an ideal sample size given a desired level of precision desired confidence level and the estimated proportion of the attribute present in the. N1 384 1384528 222. 385 1 384 1000 278. Is that possible to use Cochran formula sample size determination for.
