Question

_{determine the area of the region indicated.}

_{1) -1 < Z <1}

_{2) -2 < Z < 2}

Answer 1

1)

$P(-1<z<1)=0.84134-0.15866=0.68268$

2)

$P(-2<z<2)=0.97725-0.02275=0.9545$