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FTEST.PAS
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Wrap
Pascal/Delphi Source File
|
1991-05-01
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915b
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31 lines
PROCEDURE ftest(data1: gln1array; n1: integer;
data2: gln2array; n2: integer; VAR f,prob: real);
(* Programs using routine FTEST must define the types
TYPE
gln1array = ARRAY [1..n1] OF real;
gln2array = ARRAY [1..n2] OF real;
in the main routine, with n2 less than or equal to n1. *)
VAR
i: integer;
var2,var1,df2,df1,ave2,ave1: real;
BEGIN
IF (n2 > n1) THEN BEGIN
writeln('pause in routine FTEST');
writeln('first array must be the larger'); readln
END;
avevar(data1,n1,ave1,var1);
FOR i := 1 TO n2 DO data1[i] := data2[i];
avevar(data1,n2,ave2,var2);
IF (var1 > var2) THEN BEGIN
f := var1/var2;
df1 := n1-1;
df2 := n2-1
END ELSE BEGIN
f := var2/var1;
df1 := n2-1;
df2 := n1-1
END;
prob := betai(0.5*df2,0.5*df1,df2/(df2+df1*f))
+(1.0-betai(0.5*df1,0.5*df2,df1/(df1+df2/f)))
END;