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Casio FX-7400GII User Manual Page 209

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6-58
s
e
........................................standaardfout
r .........................................correlatiecoëfficiënt
r
2
........................................bepalingscoëfficiënt
Left .....................................ondergrens van het interval (linker grens)
Right...................................bovengrens van het interval (rechter grens)
9. Statistische formule
k Test
Test
Z -test op 1 steekproef
z
= (o – μ
0
)/(σ/'n )
Z -test op 2 steekproeven
z
= (o
1
– o
2
)/ (σ /n
1
) + (σ /n
2
)
2
1
2
2
Z -test op 1 groep van
treffers
z
= (x/n – p
0
)/ p
0
(1 – p
0
)/n
Z -test op 2 groepen van
treffers
z
= (x
1
/n
1
– x
2
/n
2
)/ pˆ
(1 – pˆ
)(1/n
1
+ 1/n
2
)
t -test op 1 steekproef
t = (o – μ
0
)/(s
x
/'n )
t -test op 2 steekproeven
(met samengevoegde
varianties)
t = (o
1
– o
2
)/ s
p
2
(1/n
1
+ 1/n
2
)
df = n
1
+ n
2
− 2
s
p
= ((
n
1
– 1)s
x
1
2
+ (n
2
– 1)s
x
2
2
)/(n
1
+ n
2
– 2)
t -test op 2 steekproeven
(zonder samengevoegde
varianties)
t = (o
1
– o
2
)/ s
x
1
2
/n
1
+ s
x
2
2
/n
2
C = (s
x
1
2
/n
1
)/(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))
t -test voor lineaire regressie
t = r (n – 2)/(1 – r
2
)
b =
Σ
(x
i
– o)(y
i
– p)/
Σ
(x
i
– o)
2
a = p – bo
i=1
n
i=1
n
χ
2
GOF test
O
i
: Het i -e element van de
beoordeelde lijst
E
i
: Het i -e element van de verwachte
lijst
χ
2
tweedimensionale test
O
ij
: Het element op rij i , kolom j van
de beoordeelde matrix
E
ij
: Het element op rij i , kolom j van
de verwachte matrix
F -test op 2 steekproeven
F = s
x
1
2
/s
x
2
2
χ
2
=
Σ
(O
i
− E
i
)
2
/E
i
i
k
χ
2
=
Σ
(O
i
− E
i
)
2
/E
i
i
k
χ
2
=
ΣΣ
(O
ij
− E
ij
)
2
/E
ij
i
k
j
R
k
R
E
ij
=
Σ
O
ij •
Σ
O
ij
/
ΣΣ
O
i
j
i=1
k
j=1 i=1 j=1
R
χ
2
=
ΣΣ
(O
ij
− E
ij
)
2
/E
ij
i
k
j
R
k
R
E
ij
=
Σ
O
ij •
Σ
O
ij
/
ΣΣ
O
i
j
i=1
k
j=1 i=1 j=1
R
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