P(−z0<Z<0)=0.5−P(Z<−z0)P(-z_0<Z<0)=0.5-P(Z<-z_0)P(−z0<Z<0)=0.5−P(Z<−z0)
0.5−P(Z<−z0)=0.37080.5-P(Z<-z_0)=0.37080.5−P(Z<−z0)=0.3708
P(Z<−z0)=0.5−0.3708=0.1292P(Z<-z_0)=0.5-0.3708=0.1292P(Z<−z0)=0.5−0.3708=0.1292
−z0=−1.13-z_0=-1.13−z0=−1.13
z0=1.13z_0=1.13z0=1.13
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