S ubject:
S tatistics
Created
b y:
J ianru
S hi
Revised:
3 /2/2017
Using
t he
S tandard
N ormal
T able
There
a re
t wo
t ypes
o f
s tandard
n ormal
t ables.
B efore
a ttempting
t o
f ind
e ither
t he
z -‐score
o r
t he
probability
o n
t he
t able,
m ake
s ure
you
k now
w hich
t able
y ou
a re
u sing.
The
C umulative
P robability
T able
Each
e ntry
i n
t he
c umulative
probability
t able
i s
t he
p robability
of
a
r andom
v ariable
( x)
i s
l ess
t han
o r
e qual
t o
a
s pecified
v alue
( z),
w hich
i s
i llustrated
i n
t he
graph
a s
t he
s haded
a rea
f rom
t he
v alue
z
t o
t he
l eft.
The
N ormal
C urve
A rea
T able
Each
e ntry
i n
t he
n ormal
c urve
a rea
t able
i s
t he
p robability
o f
a
r andom
v ariable
( x)
i s
b etween
0
and
t he
s pecial
v alue
z ,
w hich
i s
i llustrated
i n
t he
g raph
a s
t he
s haded
a rea
f rom
t he
0
t o
v alue
z .