Judica¨el Courant 15 novembre 2016
1 DS1
1.1 Rangs
> note <- sort(round(ds1$Note,digits=1))
> rang <- c(33:-1:1)
> plot(rang,note)
∗Les calculs et graphiques de ce texte ont ´et´e r´ealis´es avec R (https://www.r-project.org/), le logiciel de r´ef´erence en mati`ere de calculs statistiques.
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0 5 10 15 20 25 30
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rang
note
> print(cbind(rang,note))
rang note [1,] 33 3.8 [2,] 32 3.9 [3,] 31 4.4 [4,] 30 4.8 [5,] 29 5.2 [6,] 28 5.9 [7,] 27 6.4 [8,] 26 6.7 [9,] 25 7.8 [10,] 24 8.0 [11,] 23 8.1 [12,] 22 8.2 [13,] 21 8.5 [14,] 20 9.4 [15,] 19 9.8
[16,] 18 9.9 [17,] 17 9.9 [18,] 16 10.2 [19,] 15 10.3 [20,] 14 10.4 [21,] 13 10.6 [22,] 12 10.8 [23,] 11 10.8 [24,] 10 10.8 [25,] 9 11.1 [26,] 8 11.4 [27,] 7 11.8 [28,] 6 12.5 [29,] 5 12.8 [30,] 4 13.1 [31,] 3 13.2 [32,] 2 14.9 [33,] 1 15.8
> hist(note,main='Histogramme des notes',ylab='Fr´equence',xlab='Note')
Histogramme des notes
Note
Fréquence
2 4 6 8 10 12 14 16
0246810
1.3 Quartiles
> boxplot(ds1$Note)
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> print(summary(ds1$Note))
Min. 1st Qu. Median Mean 3rd Qu. Max.
3.833 7.750 9.917 9.432 11.080 15.750
1.4 ´Ecart-type Ecart-type :´
> print(sd(ds1$Note)) [1] 3.084913
2 DS2
2.1 Rangs
> note <- sort(round(ds2$Note,digits=1))
> rang <- c(33:-1:1)
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0 5 10 15 20 25 30
468101214
rang
note
> print(cbind(rang,note))
rang note [1,] 33 3.7 [2,] 32 3.9 [3,] 31 4.7 [4,] 30 4.7 [5,] 29 5.7 [6,] 28 6.4 [7,] 27 6.6 [8,] 26 7.2 [9,] 25 7.2 [10,] 24 7.2 [11,] 23 7.4 [12,] 22 8.1 [13,] 21 8.3 [14,] 20 8.6 [15,] 19 8.8
[16,] 18 9.3 [17,] 17 9.4 [18,] 16 9.8 [19,] 15 9.8 [20,] 14 10.8 [21,] 13 11.0 [22,] 12 11.6 [23,] 11 12.7 [24,] 10 13.3 [25,] 9 13.5 [26,] 8 13.8 [27,] 7 13.8 [28,] 6 14.0 [29,] 5 14.0 [30,] 4 14.2 [31,] 3 14.5 [32,] 2 14.5 [33,] 1 15.4
2.2 Histogramme
> hist(note,main='Histogramme des notes',ylab='Fr´equence',xlab='Note')
Histogramme des notes
Note
Fréquence
2 4 6 8 10 12 14 16
02468
2.3 Quartiles
> boxplot(ds2$Note)
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> print(summary(ds2$Note))
Min. 1st Qu. Median Mean 3rd Qu. Max.
3.692 7.246 9.446 9.821 13.510 15.370
2.4 ´Ecart-type Ecart-type :´
> print(sd(ds2$Note)) [1] 3.534847
