A parking-occupancy team can afford a bigger test pile. One camp wants to keep the confidence level and shrink the margin. The other wants to keep the margin and raise the confidence. What do those two official trade-offs mean?
Select an answer to reveal the explanation.
Short Explanation
A bigger test pile can be spent two official ways: keep the confidence level and shrink the margin of error, or keep the margin and raise the confidence. More tests make the result more precise or more certain. Dropping both, treating sample size as irrelevant, and a Chapter 5 type constraint miss those trade-offs.
Full Explanation
As sample size grows, testers may fix confidence and shrink the margin of error, or fix the margin and raise confidence. Dropping both, treating sample size as irrelevant, or substituting a Chapter 5 constraint miss those trade-offs.