Question

P(-2.81>z>1.05)=

Answer 1

$P(-2.81<z<1.05)=P(z<1.05)-P(z<-2.81)$

From Standard Normal Distribution Table,

P(z < 1.05) = 0.85314

P(z < -2.81) = 0.00248

$\implies P(z<1.05)-P(z<-2.81)= 0.85314-0.00248 = 0.85066$

Hence, $\boxed{P(-2.81>z>1.05)=0.85066}$