Figure Standard normal curve and some important divisions. 99,74 99,5% P(-1<z<1)=06826 P(-2<z<2)=09545 P(-3<z<3)=0.9974 +2 17Figure Standard normal curve and some important divisions. 17 •P(-1 < z < 1)=0.6826 •P(-2 < z < 2)=0.9545 •P(-3 < z < 3)=0.9974