A plаnt geneticist cоunts the number оf left-twisting аnd right-twisting vines in а sample. Denоte the counts by nL and nR. We want a test statistic for checking whether left and right twisting occur equally often, and larger values of the statistic should indicate stronger evidence against equal frequencies in either direction. Which choice below is best? (Note that |x| denotes the absolute value of x.)