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Die steekproefgrootte nodig om die populasieproporsie binne 3% te beraam met 90%...
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Die steekproefgrootte nodig om die populasieproporsie binne 3% te beraam met 90% vertroue indien ons aanvaar dat die steekproefproporsie 0.28 is, is / The sample size necessary to estimate a population proportion to within 3% with 90% confidence assuming a sample proportion of 0.28 is
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