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sosövn1

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Feb 22nd, 2018
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  1. clear all;clc
  2. n=1000;
  3. data=randn(n,1);
  4.  
  5. figure(1);plot(data,'rx');title('norm-fördelad S.V.');hold on
  6. xlabel('slumpning:');ylabel('värde på S.V.');legend('värde S.V.')
  7. data1=mean(data);
  8. data2=mean(data);
  9. plot([1,n],[data1,data2]);legend('medelvärde')
  10. xlim([0,n+1])
  11. legend('värde s.v.','medelvärde')
  12.  
  13. %medelvärde
  14. medelvarde=mean(data)
  15. %standardavvikelse
  16. standardavvikelse=std(data)
  17.  
  18. %DEL 2
  19. N=1000;
  20. for k=1:N
  21. sampel=randn(n,1);
  22. m=mean(sampel);
  23. s=std(sampel);
  24. z(k)=(m-0)/(s/sqrt(n));
  25.  
  26. end
  27. z;
  28. figure(2);histfit(z)
  29. figure(3);normplot(z)
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