Given the Following Work Sampling Data, Based Upon 100 Random

Short Answer

Given the following work sampling data, based upon 100 random observations of a particular worker: $$\begin{array} { l c } \text { Activity } & \text { Times Observed } \\\hline \text { A } & 20 \\\text { B } & 50 \\\text { C } & 10 \\\text { Others } & 20\end{array}$$ For a confidence level of 95.44 percent and a maximum error of .04, what should be the sample size for estimating the proportion of time spent performing activity B?