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misleading graphs - scale distortion - wrong type of visualization - 3D distortion - missing information - cherry picking - graph not properly labelled
Scale Distortion L’échelle est manipulée pour exagérer ou minimiser une différence. (ne commence pas à 0)
Wrong Type of Visualization Mauvais choix de graphique.
3D Distortion Les graphiques en 3D déforment les proportions.
Missing Information Informations absentes : - source - unité - période - taille de l’échantillon Sans contexte : les conclusions peuvent être fausses.
Cherry Picking On sélectionne uniquement les données qui arrangent. Exemple : Montrer uniquement les années où les ventes augmentent.
Graph Not Properly Labelled Manque : - titre - axes - unités Le lecteur ne comprend pas ce qui est représenté.
misleading calculations average vs median
si présence d'outliers = mediane
average (mean) somme de x / n Très sensible aux valeurs extrêmes.
median Valeur située au milieu de la distribution. Très peu sensible aux valeurs extrêmes.
def outliers valeur tres eloignee de reste des observations
dangereux ? modifient : - moyenne - variance - écart-type - intervalles de confiance
calcul mediane chiffre milieu deux chiffres du milieu /2
Created by: Philippine
 

 



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