A stratified sample of size $n=300$ is to be taken from a population of size $N=30,000$ which consists of four strata for which $N_{1}=10,000, N_{2}=5,000, N_{3}=8,000, N_{4}=7,000, \sigma_{1}=15, \sigma_{2}=25, \sigma_{3}=20$ and $\sigma_{4}=30$. How large a sample must be taken from each stratum if the allocation is to be
-optimum?

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The Answer of A stratified sample of size $n=300$ is to be taken from a population of size $N=30,000$ which consists of four strata for which $N_{1}=10,000, N_{2}=5,000, N_{3}=8,000, N_{4}=7,000, \sigma_{1}=15, \sigma_{2}=25, \sigma_{3}=20$ and $\sigma_{4}=30$. How large a sample must be taken from each stratum if the allocation is to be
-optimum?

A Stratified Sample of Size n=300n=300n=300 Is to Be Taken from a Population of Size

A Stratified Sample of Size $n=300$ Is to Be Taken from a Population of Size