User manual - fx-9860GII_Soft

6-5555
2-Sample t-interval
(samlet)
Left, Right = (o
1
– o
2
) + t
n
1
+n
2
−2
( /2) s
p
2
(1/n
1
+ 1/n
2
)
s
p
= ((n
1
– 1)s
x
1
2
+ (n
2
– 1)s
x
2
2
)/(n
1
+ n
2
– 2)
α
2-Sample t-interval
(ikke samlet)
Left, Right = (o
1
– o
2
) + t
df
( /2) s
x
1
2
/n
1
+ s
x
2
2
/n
2
df = 1/(C
2
/(n
1
– 1) + (1 – C)
2
/(n
2
– 1))
α
C = (s
x
1
2
/n
1
)/(s
x
1
2
/n
1
+ s
x
2
2
/n
2
)
A : signifikansniveau A = 1 − [C-Level ] C-Level : konfidensniveau (0 Level 1)
Z( A /2): øvre A /2 punkt for almindelig normalfordeling
t
df
( A /2): øvre A /2 punkt for t-fordeling med df frihedsgrader
I Fordeling (kontinuerlig)
Fordeling Sandsynlighedstæthed Kumulativ fordeling
Normal
fordeling

2
p(x) =
1
e
–
2
2

(x – )
2

(  > 0)

p = p(x)dx
Upper
Lower

Student-t
fordeling
p(x) =



 df

–
df+1
2
2
df
2
df + 1
df
x
2
1 +
C
2
fordeling
p(x) =

(x  0)

1
2
df
df
2
 x
2
1
df
2
–1
x
2
–
 e
F fordeling
ndf
2
x
ddf
ndf
ndf
2
–1
ddf
ndf  x
1 +
ndf + ddf
2
p(x) =
–

2
ndf + ddf

2
ndf

2
ddf
(x  0)
Fordeling
Invers kumulativ fordeling
Normal
fordeling
p = p(x)dx
Upper
–

p = p(x)dx
Lower


p = p(x)dx
Upper
Lower

hale = Left hale = Right hale = CentralLeft hale = Right hale = Centralhale = Right hale = Central = Right hale = Centralhale = Central = Central
Student-
t
fordeling
p = p(x)dx
Lower


C
2
fordeling
F fordeling