The Manager of Lawn and Garden Services Would Like to Estimate

question 115

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: $$\begin{array} { l r } \text { Activity } & \text { Times Observed } \\\hline \text { Mowing } & 200 \\\text { Trimming } & 80 \\\text { Raking } & 40 \\\text { Miscellaneous } & 80\end{array}$$ 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

---

Definitions:

Average Fixed Costs

Fixed production costs (unchanged by output volume) divided by the total produced output quantity.

Short-Run

A period in which at least one factor of production is fixed, influencing how businesses can respond to changes in demand or supply.

Total Costs

The aggregate amount of all costs, both fixed and variable, incurred in producing goods or providing services.

Microwave Ovens

Electrical appliances that use microwave radiation to heat and cook food rapidly.