EL KADIRI Achraf EXERCICE 2 : 1) Xi 89 89.6 89.7 89.8 89.9 90 90.1 90.2 90.3 90.4 92.2 ni 1 1 1 2 6 8 7 1 1 1 1 2) Ni : Effectifs cumulés |fi :Fréquence |Fi :Fréquences cumulés Xi 89 89.6 89.7 89.8 89.9 90 90.1 90.2 90.3 90.4 92.2 ni 1 1 1 2 6 8 7 1 1 1 1 Ni fi(%) Fi(%) 1 3.33 3.33 2 3.33 6.66 3 3.33 9.99 5 6.66 16.65 11 20 36.65 19 26.66 63.31 26 23.33 86.64 27 3.33 89.97 28 3.33 93.3 29 3.33 96.63 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) 28 50 106 196 55 190 110 60 48 35 86 65 32 52 40 260 70 117 90 30 105 52 80 60 140 20 100 28 PRIX_MILLIERS_EUROS (Yi) 130 280 650 800 268 790 500 320 250 250 350 300 155 245 200 1500 325 950 378 78 375 200 270 295 990 85 495 85 (Xi-X̅ ) (yi-¥) (Xi-X̅)² (yi-¥)² -54.3214 -32.3214 23.6786 113.6786 -27.3214 107.6786 27.6786 -22.3214 -34.3214 -47.3214 3.6786 -17.3214 -50.3214 -30.3214 -42.3214 177.6786 -12.3214 34.6786 7.6786 -52.3214 22.6786 -30.3214 -2.3214 -22.3214 57.6786 -62.3214 17.6786 -54.3214 -281.2142 -131.2142 238.7858 388.7858 -143.2142 378.7858 88.7858 -91.2142 -161.2142 -161.2142 -61.2142 -111.2142 -256.2142 -166.2142 -211.2142 1088.7858 -86.2142 538.7858 -33.2142 -333.2142 -36.2142 -211.2142 -141.2142 -116.2142 578.7858 -326.2142 83.7858 -326.2142 2950.814498 1044.672898 560.676098 12922.8241 746.458898 11594.6809 766.104898 498.244898 1177.958498 2239.314898 13.533 300.030898 2532.243298 919.387298 1791.100898 31569.6849 151.816898 1202.605298 58.9609 2737.528898 514.318898 919.387298 5.38889796 498.244898 3326.820898 3883.956898 312.532898 2950.814498 79081.42628 17217.16628 57018.65828 151154.3983 20510.30708 143478.6823 586916.7147 8320.030282 25990.01828 25990.01828 3747.166039 12368.59828 65645.71628 27627.16028 44611.43828 1185454.518 7432.888282 290290.1383 1103.183082 111031.7031 1311.468282 44611.43828 19941.45028 13505.74028 334993.0023 106415.7043 7020.060282 106415.7043