If the Population Is Divided into Three Strata And$\frac{n_{1}}{N_{1} \sigma_{1}}=\frac{n_{2}}{N_{2} \sigma_{2}}=\frac{n_{3}}{N_{3} \sigma_{3}}$

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If the Population Is Divided into Three Strata And $\frac{n_{1}}{N_{1} \sigma_{1}}=\frac{n_{2}}{N_{2} \sigma_{2}}=\frac{n_{3}}{N_{3} \sigma_{3}}$

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If the Population Is Divided into Three Strata And n1N1σ1=n2N2σ2=n3N3σ3\frac{n_{1}}{N_{1} \sigma_{1}}=\frac{n_{2}}{N_{2} \sigma_{2}}=\frac{n_{3}}{N_{3} \sigma_{3}}N1​σ1​n1​​=N2​σ2​n2​​=N3​σ3​n3​​

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If the Population Is Divided into Three Strata And $\frac{n_{1}}{N_{1} \sigma_{1}}=\frac{n_{2}}{N_{2} \sigma_{2}}=\frac{n_{3}}{N_{3} \sigma_{3}}$

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