P( -c < Z < c ) = 0.9426
2*P( 0 < Z < c ) = 0.9426
P( 0 < Z < c ) = 0.9426/2
P( 0 < Z < c ) = 0.4713
P( 0 < Z < 1.9 ) = 0.4713
c = 1.9
P( 0.55 < Z < c ) = 0.2625
P( Z < c ) - P( Z < 0.55 ) = 0.2625
P( Z < 0.55 ) = 0.7088
P( Z < c ) - 0.7088 = 0.2625
P( Z < c ) = 0.7088 + 0.2625
P( Z < c ) = 0.9713
P( Z < 1.9 ) = 0.9713
c = 1.9
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