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Nicolas1501
@Nicolas1501
May 2019
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Pouvez-vous m'aider sa fait un plus de 1 heures que je cherche et je ne comprend pas la 2d et 3c.
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ProfdeMaths1
Verified answer
1) moyenne :
m1=(5*2+6*1+..+14*1)/30
m1=288/30
m1=
9,6
variance : v1=(5²*2+6²*1+...+14²*1)/30-9,6²=
5,9049
écart-type : s1=√5,9049=
2,43
2)a) il faut multiplier par
1,25
b) on multiplie chaque note par
1,25
c) m2=
12
et s2=
3,04
d) m2=
1,25*
m1 et s2=
1,25*
s1
3)a) on augmente de
2,4
b) m3=
12
et s3=
2,43
c) m3=
1,25*
m1 et s3=
1*
s1
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Verified answer
1) moyenne :m1=(5*2+6*1+..+14*1)/30
m1=288/30
m1=9,6
variance : v1=(5²*2+6²*1+...+14²*1)/30-9,6²=5,9049
écart-type : s1=√5,9049=2,43
2)a) il faut multiplier par 1,25
b) on multiplie chaque note par 1,25
c) m2=12 et s2=3,04
d) m2=1,25*m1 et s2=1,25*s1
3)a) on augmente de 2,4
b) m3=12 et s3=2,43
c) m3=1,25*m1 et s3=1*s1