**TI82** TxtView file generated by CalcText - Kouri¸ €PST4€~˙PI centr redr - PST----------------------- Centrer Reduire et Pi ----------------------- - Un signe X N (m,Sigm) P(X < a) = 1-Alpha P(X - Moy < a - Moy) P(X-m/Sigm < a-m/Sigm) Z N (0,1) P(Z < a-m/Sigm) = ? PI[a-m/Sigm] = - Deux signes P(b < X < a) = 1-Alpha P(b-m < X-m < a-m) P(b-m/Sigm < X-m/Sigm < a-m/Sigm) P(b-m/Sigm < Z < a-m/Sigm) PI[a-m/Sigm] - PI[b-m/Sigm] - Si Alpha connu Tel que : P(x)=1-Aplha si Alph = 5% Talpha = 1,96 si Alph = 1% Talpha = 2,576 si Alph = 0,1% Talpha = 3,29 Donc Talpha pour 95% = 1,96 - Exo Type Une fois P centr red P(-talph