poisson inverse gaussian distributionpoisson kernelpoisson limitpoisson lognormal distributionpoisson markov processpoisson matrixpoisson processpoisson regressionpoisson summation formulapoisson transformpoisson trend testpoisson variance testpolarpolar chartpolarization testpolicy spacepolicy space methodpollpollaczek khinchin formulapoly tpoly t distributionpolya aeppli distributionpolya eggenberger distributionpolya lundberg processpolya type 2 frequency distributionspolychoricpolychoric correlationpolygamma functionpolygonpolykayspolynomial distributionpolynomial equationpolynomial functionpolynomial modelpolynomial regressionpolynomial regression modelpolynomial splinespolynomials of matrix argumentspolyomialpolyomial regpolysamplingpolyserial correlationpolytomous variablepolytonicitypoolpool adjacent violators algorithmpooledpooled estimatepooled estimatorpooled sum of squares