A Work Sampling Method Is Used to Determine the Proportion

question 109

Multiple Choice

A work sampling method is used to determine the proportion of the time a machine is idle. The following information was gathered on a random basis.
What is the proportion of idle time observed for this machine?

• A) less than or equal to 5%
• B) greater than 5% but less than or equal to 15%
• C) greater than 15% but less than or equal to 25%
• D) greater than 25%

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Definitions:

Rejecting Null Hypothesis

The decision in hypothesis testing that the evidence is strong enough to conclude a significant effect exists.

Retaining Null Hypothesis

The decision in hypothesis testing that there is not enough evidence to reject the null hypothesis, implying the observed data does not significantly differ from what was expected.

Alpha (α)

Alpha (α) represents the level of significance in hypothesis testing, defining the threshold for rejecting the null hypothesis.

Critical Value

A critical value is a point on the distribution that represents a threshold above which significant results are considered to occur.