The manager of Lawn and Garden Services would like to estimate the proportion of employees' times spent performing various gardening or lawn care activities. The manager has made 400 random observations of a typical worker, with the following results:

ACTIVITY	NO. OF TIMES OBSERVED
Mowing	200
Trimming	80
Raking	40
Miscellaneous	80

Between what limits can the manager be 68.26 percent confident the true proportion of time spent mowing is?

Multiple Choice

• 4 and.6
• .45 and .55
• 0 and.683
• .425 and .575
• .475 and .525