A library administrator wants to determine the proportion of time the circulation clerk is idle. The following information was gathered randomly by using work sampling: Day Number of TimesClerk Busy Number of TimesClerk Idle Total Number ofObservations Monday Tuesday Wednesday Thursday Friday Saturday 8 7 9 7 8 6 2 1 3 3 2 4 10 8 12 10 10 10 If the administrator wants a 95 percent confidence level and a degree of precision of +- 4 percent, how many more observations are needed?

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Work measurement

Work measurement is an approach used by management to calculate and observe the time that employees dedicate to their work. Work measurement also determines an employee's behavior and how the individual performs a task in a given time frame. It also measures employee performance as compared to others in terms of time, usage of innovative ideas, presentation, etc.