1. Résolution de l’ex 1 p40
t=c(2:12);N=c(55,90,135,245,403,665,1100,1810,3000,4450,7350)
T=data.frame(t,N,y=log(N));T;
> T
t N y
…..

2. Calcul de moyenne et écart-type
apply(T,2,mean);
t N y
apply(T,2,sd);

3. plot(T$t,T$N)

4. plot(T$t,T$y)

5. droite de regression ll=lm(y~t,data=T);ll; Call:
lm(formula = y ~ t, data = T)
Coefficients:
(Intercept) t

6. abline(ll);

7. summary(ll) Call: lm(formula = y ~ t, data = T) Min 1Q Median 3Q Max
Residuals:
Min Q Median Q Max
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) e-14 ***
t e-15 ***
---
Signif. codes: 0 `***' `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1

8. summary(ll) suite
Residual standard error: on 9 degrees of freedom
Multiple R-Squared: , Adjusted R-squared:
F-statistic: 1.329e+04 on 1 and 9 DF, p-value: 1.413e-15