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Statistical and Practical Significance
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GMAT
DI.090 Statistical and Practical Significance
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A queue-management system reduces the 95th-percentile wait time from 12 minutes to 8 minutes, p = 0.04. The service team defines practical success as reducing 95th-percentile wait by at least 2 minutes. Which conclusion is best?
A
The result is statistically supported and practically meaningful for the stated service metric.
B
The result is not practical because average wait time is not given.
C
The system is unsupported because p = 0.04 is close to 0.05.
D
The system is practical only if every customer's wait time falls.
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