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Texas Instruments voyage 200 Manual

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968 Annexe A : Instructions et fonctions
stdDev() Menu MATH/Statistics écartTyp()
stdDev(
liste1
[,
liste2
]) ⇒
⇒⇒
⇒
expression
Retourne l’écart-type estimé d’une population
représentée par l’échantillon
liste1
,
éventuellement pondéré par les éléments de
liste2
. En l’absence de
liste2
, cet écart-type est
calculé par la formule :
sx
xx
n
i
i
n
()=
−
−
=
∑
af
2
1
1
stdDev({a,b,c}) ¸
3
3
222
⋅−⋅++−⋅+(() )aabcbbcc
stdDev({1,2,5,-6,3,-2}) ¸
62
2
stdDev({1.3,2.5,L6.4},{3,2,5}) ¸
4.33345
stdDev(
matrice1
[,
matrice2
]) ⇒
⇒⇒
⇒
matrice
Retourne la matrice ligne formée par les écarts
types (au sens défini ci-dessus) des éléments de
chaque colonne de
matrice1
, éventuellement
pondérés par les éléments correspondants de
matrice2
.
matrice1
doit avoir au moins deux lignes.
StdDev([1,2,5;-3,0,1;.5,.7,3])
¸
2179 1014 2..……
stdDev([L1.2,5.3;2.5,7.3;6,L4],[4,2;3,3;1,7]
) ¸
[2.7005,5.44695]
stdDevPop() MATH/Statistics menu écTypPo()
)
stdDevPop(
liste
[
, fréqliste
]) ⇒
⇒⇒
⇒
expression
Retourne la déviation standard de la population
des éléments de
liste
.
Retourne l’écart type des éléments de
liste
,
éventuellement pondérés par les éléments de
fréqliste
.
Remarque :
liste
doit comporter au moins deux
éléments.
En mode RADIAN et AUTO :
stdDevPop({a,b,c}) ¸
stdDevPop({1,2,5,ë 6,3,ë 2}) ¸
stdDevPop({1.3,2.5,L6.4},{3,2,5}) ¸
stdDevPop(matrix1[, fréqmatrice]) ⇒
⇒⇒
⇒ matrice
Retourne la matrice ligne formée par les écarts
types des éléments de chaque colonne de
matrice1,
éventuellement pondérés par les
éléments correspondants de
fréqmatrice
.
Remarque :
matrice1
doit comporter au moins
deux lignes.
stdDevPop([[1,2,5][-3,0,1][.5,.7,3]]) ¸
stdDevPop([L1.2,5.3;2.5,7.3;6,L4],[4,2;3,3;
1,7]) ¸
… 967 …


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