A work sampling study requires an acceptable error level of 3% and 98% confidence. a. What is the adequate sample size if the sample proportion is as large as 67%? b. What is the adequate sample size if the sample proportion is estimated to be about 31%?

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Jirah Bernal · Accepted Answer

Final Answer :  a.  Proportion, p  0.67  z-value   confidence)  2.33  Accuracy, h  0.03  Results   Sample size  1333.70  Confidence  2.39 % \begin{array}{|l|r|}\hline 	ext { Proportion, p }  &  0.67 \\hline 	ext { z-value }  &  \ 	ext { confidence) }  & 2.33 \\hline 	ext { Accuracy, h }  &  0.03 \\hline  &  \\hline 	ext { Results }  &  \\hline 	ext { Sample size }  &  1333.70 \\hline 	ext { Confidence }  &  2.39 \%\\hline\end{array}  Proportion, p   z-value   confidence)   Accuracy, h   Results   Sample size   Confidence  ​ 0.67 2.33 0.03 1333.70 2.39% ​ ​   b.  Proportion, p  0.31  z-value   confidence)   2.33   Accuracy, h  0.03  Results   Sample size  1290.27  Confidence  2.39 % \begin{array}{|l|r|}\hline 	ext { Proportion, p }  &  0.31 \\hline 	ext { z-value }  &  \ 	ext { confidence) }  &  	ext { 2.33 } \\hline 	ext { Accuracy, h }  &  0.03 \\hline  &  \\hline 	ext { Results }  &  \\hline 	ext { Sample size }  &  1290.27 \\hline 	ext { Confidence }  &  2.39 \%\\hline\end{array}  Proportion, p   z-value   confidence)   Accuracy, h   Results   Sample size   Confidence  ​ 0.31  2.33  0.03 1290.27 2.39% ​ ​

A work sampling study requires an acceptable error level of 3% and 98% confidence. a. What is the adequate sample size if the sample proportion is as large as 67%? b. What is the adequate sample size if the sample proportion is estimated to be about 31%?

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