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CHAPTER 3: Random Variables and Probability Distributions

CHAPTER3: RandomVariablesandProbability DistributionsConceptof a Theoutcomeof a randomexperiment neednotbe a number. However,we areusuallyinterestednotin theoutcomeitself,butratherin somemeasurement of :Considertheexperiment in which batteriescomingo anassemblylinewereexamineduntil agood one(S)was , FS,FFS,: : :g:We may be interestedin thenumber of batteriesexaminedbeforetheexperiment randomvariableis a functionthatassociatea realnumber witheach element in :Tossingtwo coinsS=fHH,TT,HT,THgLetX= # of :A groupof 4 components is knownto contain2 thetimeuntil the2 defectives of thetestonwhich theseconddefective is types of randomvariables Adiscreterandomvariableis a randomvariablewhosepossiblevalueseitherc onstitutea nitesetor elsecanbe listedin anin nitesequence.

CHAPTER 3: Random Variables and Probability Distributions Concept of a Random Variable: 3.1 The outcome of a random experiment need not be a number. However, we are usually interested not in the outcome itself, but rather in some measurement of the outcome.

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