How Many Observations Should Be Taken to Be 90% Confident

question 22

Multiple Choice

How many observations should be taken to be 90% confident of being within +2% of the actual time a machine is busy if it is believed that the machine is in use 70% of the time?

• A)2,021 observations
• B)1,421 observations
• C)789 observations
• D)365 observations

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Definitions:

Division of Labor

Refers to the separation of a work process into a number of tasks, with each task performed by a separate person or group.

Decentralized

A form of organizational structure where decision-making is distributed among various levels and segments, allowing more autonomy and flexibility.

Integrator Roles

Positions or functions within an organization tasked with coordinating and synthesizing diverse elements, processes, or departments.

Direct Supervision

The practice of overseeing employees' performance and tasks in a close and hands-on manner to ensure effectiveness and adherence to protocols.