A Work Sampling Method Is Used to Determine the Proportion

question 10

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 700
• B) greater than 700 but fewer than or equal to 800
• C) greater than 800 but fewer than or equal to 900
• D) greater than 900

---

Definitions:

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, typically influencing the shape of the distribution.

Confidence Interval

A range of values derived from sample statistics that is likely to contain the value of an unknown population parameter.

Confidence Interval

Various values, obtained from sample measures, that are likely to contain the essence of an unknown population parameter.

Confidence Interval

A selection of values, taken from data sampling, that is presumed to hold the value of a hidden population attribute.