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Normal distribution as a limit of t distributions

S.Mustonen, Survo Users' Guide (1992), p. 327

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   1 *
   2 *HEADER=Normal_distribution_as_a_limit_of_t_distributions_(df=2,4,...,20)
   3 *SIZE=1164,600 XDIV=170,900,94 YDIV=80,420,100
   4 *INTEGRAL=1 XSCALE=-12(2)12 TICK=1                    *GLOBAL*
   5 *YSCALE=0(0.1)0.4 X=-12,12,0.1  DEVICE=PS
   6 *.......................................................................
   7 *PLOT Y(X)=exp(-0.5*X*X)                / DEVICE=PS,TDIST1.PS
   8 *.......................................................................
   9 *PLOT Y(X)=(1+X*X/N)^(-(N+1)/2)  / N=2,20,2
  10 *X=-12,12,0.1 HEADER=  FRAME=0          / DEVICE=PS,TDIST2.PS
  11 *.......................................................................
  12 *YSCALE=*probit(y),0.001,0.01,0.1,0.5,0.9,0.99,0.999
  13 *PLOT INTEGRAL Y(X)=exp(-0.5*X*X)       / DEVICE=PS,TDIST3.PS
  14 *.......................................................................
  15 *YSCALE=*probit(y),0.001,0.01,0.1,0.5,0.9,0.99,0.999
  16 *PLOT INTEGRAL Y(X)=(1+X*X/N)^(-(N+1)/2)  / N=2,20,2
  17 *X=-12,12,0.1 HEADER=  FRAME=0            DEVICE=PS,TDIST4.PS
  18 *.......................................................................
  19 *PRINT CUR+1,E 
  20 % 1000
  21 - picture TDIST1.PS
  22 - picture TDIST2.PS
  23 % 620
  24 - picture TDIST3.PS
  25 - picture TDIST4.PS
  26 E
  27 *

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