P(Z > 2.3)
P(Z>2.3)
is the same as
P(∞>Z>2.3)
Again from normal distribution tables,
(for example from:
http://www.statsoft.com/textbook/distribution-tables/#z)
Z(∞)=0.5
Z(2.3) = 0.4893
Therefore
P(∞>Z>2.3)
= 0.5-0.4893
= 0.0107
is the same as
P(∞>Z>2.3)
Again from normal distribution tables,
(for example from:
http://www.statsoft.com/textbook/distribution-tables/#z)
Z(∞)=0.5
Z(2.3) = 0.4893
Therefore
P(∞>Z>2.3)
= 0.5-0.4893
= 0.0107