A Work Sampling Method Is Used to Determine the Proportion

question 73

Multiple Choice

A work sampling method is used to determine the proportion of the time a worker is idle. The following information was gathered on a random basis.
If the manager wants a 95 percent confidence level (z = 1.96) and a degree of precision of + 0.03, how many more observations are needed?

• A) fewer than or equal to 600
• B) greater than 600 but fewer than or equal to 800
• C) greater than 800 but fewer than or equal to 1,000
• D) greater than 1,000

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