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Lecture

Stat2040 L.3 Probability.pdf

7 Pages
152 Views

Department
Statistics
Course Code
STAT 2040
Professor
Jeremy Balka

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Description
ProbabilityRecalltheexperimentinvestigatingtheeectofcalorierestrictiononlongevityinmiceMicewererandomlyassignedtooneof6dietsAcontrolgroupthatwereallowedtoeatanunlimitedamountR1R2R3R4andR5Thesewere5increasinglycalorierestricteddiets7060504030Survival Time Months20NPR1R2R3R4R5DietSurvivaltimesforthedierentdietsAtypicalstatisticalinferencequestionisalongthelinesofWhatistheprobabilityofseeingdierenceslikethisifinrealitythecalorierestrictionhasnoeectonlongevityofmiceWealsomakestatementslikeWecanbe95condentthatthedierenceinpopulationmeansurvivaltimebetweentheR2andR1dietsliessomewhereintheinterval511ProbabilityBasicsTwocoinsaretossedWhatistheprobabilitybothcomeupheadsTwosixsideddicearerolledWhatistheprobabilitytheyarebothanevennumberbutnotequalThesearetwoexamplesofprobabilityexperimentsInaprobabilityexperimentwecannotpredictindividualoutcomeswithcertaintybutwemayknowthelongrundistributionoftheoutcomes
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