EL KADIRI Achraf AD2

EL KADIRI Achraf
EXERCICE 2 :
1)
Xi
ni
89
1
89.6
1
89.7
1
89.8
2
89.9
6
90
8
90.1
7
90.2
1
90.3
1
90.4
1
92.2
1
2) Ni : Effectifs cumulés |fi :Fréquence |Fi :Fréquences cumulés
Xi
ni
Ni
fi(%)
Fi(%)
89
1
1
3.33
3.33
89.6
1
2
3.33
6.66
89.7
1
3
3.33
9.99
89.8
2
5
6.66
16.65
89.9
6
11
20
36.65
90
8
19
26.66
63.31
90.1
7
26
23.33
86.64
90.2
1
27
3.33
89.97
90.3
1
28
3.33
93.3
90.4
1
29
3.33
96.63
92.2
1
30
3.33
99.96
**90 : le mode de la variable mesure.
**(N+1)/2=6 =>mediane Q2=90
**90.036 : la moyenne de la variable mesure
**0.2183 :la variance
**0.4672 : l’ecartype
3) Le mode, la médiane et la moyenne sont presque égaux.

EXERCICE 3 :

2)
Moy des prix (Y) = 411.2142
Moy de la surface (X)= 82.3214
Surface
(Xi)
PRIX_MILLIERS_EUROS
(Yi)
(Xi-X̅)
(yi-¥)
(Xi-X̅)²
(yi-¥)²
28
130
-54.3214
-281.2142
2950.814498
79081.42628
50
280
-32.3214
-131.2142
1044.672898
17217.16628
106
650
23.6786
238.7858
560.676098
57018.65828
196
800
113.6786
388.7858
12922.8241
151154.3983
55
268
-27.3214
-143.2142
746.458898
20510.30708
190
790
107.6786
378.7858
11594.6809
143478.6823
110
500
27.6786
88.7858
766.104898
586916.7147
60
320
-22.3214
-91.2142
498.244898
8320.030282
48
250
-34.3214
-161.2142
1177.958498
25990.01828
35
250
-47.3214
-161.2142
2239.314898
25990.01828
86
350
3.6786
-61.2142
13.533
3747.166039
65
300
-17.3214
-111.2142
300.030898
12368.59828
32
155
-50.3214
-256.2142
2532.243298
65645.71628
52
245
-30.3214
-166.2142
919.387298
27627.16028
40
200
-42.3214
-211.2142
1791.100898
44611.43828
260
1500
177.6786
1088.7858
31569.6849
1185454.518
70
325
-12.3214
-86.2142
151.816898
7432.888282
117
950
34.6786
538.7858
1202.605298
290290.1383
90
378
7.6786
-33.2142
58.9609
1103.183082
30
78
-52.3214
-333.2142
2737.528898
111031.7031
105
375
22.6786
-36.2142
514.318898
1311.468282
52
200
-30.3214
-211.2142
919.387298
44611.43828
80
270
-2.3214
-141.2142
5.38889796
19941.45028
60
295
-22.3214
-116.2142
498.244898
13505.74028
140
990
57.6786
578.7858
3326.820898
334993.0023
20
85
-62.3214
-326.2142
3883.956898
106415.7043
100
495
17.6786
83.7858
312.532898
7020.060282
28
85
-54.3214
-326.2142
2950.814498
106415.7043