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Figure 2: Plasma probit versus log MR plot of Hausa/Fulani phenotype study. Scatter (XY) chart showing trend line with a best linear fit to the data and polynomial equation. At xintercept where y = 0, the equation becomes –0.052x2+0.347x + 0.505 = 0. The values of x were –1.2 and 7.9 and therefore –1.2 was taken as the antimode. Graphically all the probits fit into the trend line 
