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- %Intr-un calculator sosesc in medie 15 mesaje pe secunda.Nr de mesaje /s
- %este o variabila aleatoare Poisson.Sa se calculeze probabilitatea ca
- %intr-o secunda
- %a) sa nu soseasca nici un mesaj;
- %b) sa soseasca 10 mesaje;
- %c) sa soseasca cel mult 10 mesaje;
- %d) sa soseasca cel putin 10 mesaje.
- clc;
- clear all;
- help l3p2.m
- a=10;
- n=input('n=');
- l=input('lambda =');
- x=zeros(2,n+1);
- F=zeros(1,n+1);
- k=(0:n);
- for k=0:n
- x(1,k+1)=k;
- x(2,k+1)=((l^k)/factorial(k))*(exp(-l));
- end
- %x'
- F=cumsum(x(2,:));
- [x',F']
- subplot(2,1,1);
- stem(x(1,:),x(2,:));
- subplot(2,1,2);
- stairs(x(1,:),F);
- M=sum(x(1,:).*x(2,:));
- M
- D=sum(x(1,:).^2.*x(2,:))-M^2;
- D
- D2=sum((x(1,:)-M).^2.*x(2,:));
- D2
- disp('- a');
- x(2,1)
- disp('- b');
- x(2,11)
- disp('- c');
- F(a+1)
- sum(x(2,1:a+1))
- disp('- d');
- 1-F(a)
- 1-sum(x(2,1:a))
- sum(x(2,a+1:n))
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