The Manager of Lawn and Garden Services Would Like to Estimate

Multiple Choice

The manager of Lawn and Garden Services would like to estimate the proportion of her employees' time spent performing various gardening and lawn care activities. She has made 400 random observations of a typical worker, with the following results: $$\begin{array} { l c } \text { Activity } & \text { Time Observed } \\\hline \text { Mowing } & 200 \\\text { Trimming } & 80 \\\text { Raking } & 40 \\\text { Miscellaneous } & 80\end{array}$$
Between what limits can the manager be 68.26 percent confident about the true proportion of time spent mowing?

A)  0 and .683
B)  .475 and .525
C)  .45 and .55
D)  .425 and .575
E)  .4 and .6