Answer to Question #327639 in Statistics and Probability for paopao

Question

   1. P( < 2.20)

     2. P( -2.5 < z < 2.01) 

Answer 1

$P(Z<2.20)=0.9861$

$P(-2.50<Z<2.01)=P(Z<2.01)-P(Z<-2.50)=0.9716$