Notes option informatique sp´ e ∗
Judica¨el Courant 22 novembre 2016
1 DS1
1.1 Rangs
> note <- sort(round(ds1$Note,digits=1))
> rang <- c(length(note):1)
> plot(rang,note)
∗Les calculs et graphiques de ce texte ont ´et´e r´ealis´es avec R (https://www.r-project.org/), le logiciel de r´ef´erence en mati`ere de calculs statistiques.
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0 5 10 15 20 25 30 35
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rang
note
> print(cbind(rang,note))
rang note [1,] 35 5.5 [2,] 34 6.3 [3,] 33 6.9 [4,] 32 7.7 [5,] 31 7.7 [6,] 30 7.8 [7,] 29 8.0 [8,] 28 8.5 [9,] 27 8.6 [10,] 26 8.7 [11,] 25 9.2 [12,] 24 9.3 [13,] 23 9.8 [14,] 22 9.8 [15,] 21 10.5 [16,] 20 10.8
[17,] 19 10.9 [18,] 18 11.3 [19,] 17 11.5 [20,] 16 11.5 [21,] 15 11.6 [22,] 14 12.0 [23,] 13 12.1 [24,] 12 13.1 [25,] 11 13.2 [26,] 10 14.1 [27,] 9 14.1 [28,] 8 14.5 [29,] 7 15.7 [30,] 6 15.7 [31,] 5 16.9 [32,] 4 17.8 [33,] 3 17.9 [34,] 2 18.1 [35,] 1 19.2
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1.2 Histogramme
> hist(note,main='Histogramme des notes',ylab='Fr´equence',xlab='Note')
Histogramme des notes
Note
Fréquence
5 10 15 20
02468
1.3 Quartiles
> boxplot(ds1$Note)
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> print(summary(ds1$Note))
Min. 1st Qu. Median Mean 3rd Qu. Max.
5.516 8.642 11.280 11.610 14.100 19.250
1.4 ´Ecart-type Ecart-type :´
> print(sd(ds1$Note)) [1] 3.676018
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