ch09a1.pdf - Chapter 9, Part A Hypothesis Testing...

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1Chapter 9, Part AHypothesis TestingDeveloping Null and Alternative HypothesesPopulation Mean:sKnownPopulation Mean:sUnknownExample:Metro EMSNull and Alternative HypothesesOperating in a multiplehospital system withapproximately 20 mobile medicalunits, the service goal is to respond to medicalemergencies with a mean time of 12 minutes or less.A major west coast city providesone of the most comprehensiveemergency medical services inthe world.The director of medical services wants to determinewhether or not the service goal of 12 minutes or lessis being achieved.A hypothesis test will be developed. A sample ofemergency response times will be used to test thehypotheses.Example:Metro EMSNull and Alternative Hypotheses
2Null and Alternative HypothesesThe emergency service is meetingthe response goal; no follow-upaction is necessary.The emergency service is notmeeting the response goal;appropriate follow-up action isnecessary.H0:Ha: where:= mean response time for the populationof medical emergency requests

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Term
Spring
Professor
Ahrens,MarkE
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