Formulas for Final exam.docx

41 views2 pages
26 Apr 2013
School
Department
Course
Formulas you will be given on the Final exam.
X
XN
X
N
Median location = (N+1)/2
 
2
2
1
XX
sN
 
2
2
2
1
X
XN
sN
 
2
2X
N
 
2
1
XX
sN
 
2
2
1
X
XN
sN
 
2
X
N
2
()SS X X
2
1
SS
sN
x
z
XX
zs
X
XX
z
N



N
X
N
S
X
S
X
t
X
N
S
SX
df = n - 1
N
S
D
S
D
tD
D
00
N
S
SD
D
df = n - 1
12
12 1 2
22
12
12
XX
X X X X
tSSS
nn


12
22
12
12
XX
SS
Snn

df = n1 + n2 - 2
12
22
12
pp
XX
tSS
nn
12
2
12
11
p
XX
Snn



22
21 1 2 2
12
( 1)( ) ( 1)( )
2
pn S n S
Snn
 

df = n1 + n2 2
.95 .05()
x
CI X t S
.99 .01()
x
CI X t S
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