sequential chi squared testsequential estimationsequential estimation of the meansequential life testingsequential probability ratiosequential probability ratio testsequential proceduresequential rank estimatorsequential rejective bonferroni proceduresequential samplingsequential savage testsequential t or 2 testsequential t testsequential testsequential tests of composite hypothesessequential trialsserial correlationserial covarianceserial testserial test of randomnessserial variationseriationseriesservice factorservice periodservice timeserviceabilitysetset aside methodshanmugan numbersshannon theoremshannon wiener indexshape factorshape statisticsshapiro wilk w statisticsharp null hypothesissharpe and lotka modelsharpening datasheffer polynomialssheppard correctionsherman distributionsherman test statisticshewhart chartshewhart principleshift modelshock modelshorack estimatorshore approximationshort cut methodshort data