Fermilab-Tevatron. Measurement of the shape of the boson rapidity distribution in PBAR P --& gt; Z/GAMMA --& gt; E+ E- X interactions at c.m. energy of 1.96 TeV. Data are taken with a total integrated luminosity of 0.4 FB-1 in the E+ E- mass range 71 to 111 GeV.. Table 2 contains a breakdown of the systematic errors contributing to the uncertainty on (EPS*A) the efficiency * acceptance correction. These are:. DEL(E-STAT) - statistics contributing to single electron efficiency.. DEL(E-METH) - other uncertainties contributing to single electron efficiency.. DEL(PDF) - uncertainty due to PDF.. DEL(ESCALE) - energy scale uncertainty.. DEL(VTX) - uncertainty due to model of the vertex Z distribution.. Details can be found in the paper.