» x = normrnd(0,1,50,1);
» m = mean(x)

m =

    0.0393

» [h,sig,ci] = ztest(x,0,1,0.01)

h =

     0


sig =

    0.7809


ci =

   -0.3249    0.4036

» [h,sig,ci] = ztest(x,2,1,0.05)

h =

     1


sig =

  1.0464e-043


ci =

   -0.2378    0.3165

»