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PDP-10 Archives
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decus_20tap1_198111
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decus/20-0020/stat08.sta
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100' NAME--STAT08
110'
120' DESCRIPTION--COMPARES TWO GROUPS OF DATA USING THE MEDIAN TEST.
130'
140' SOURCE--UNKNOWN
150'
160' INSTRUCTIONS--PUT DATA IN LINE 900 AND FOLLOWING.
170' THE FIRST DATUM IS THE NUMBER OF ENTRIES IN THE FIRST
180' GROUP, THEN ENTER THE NUMBER OF ENTRIES IN THE SECOND GROUP,
190' THEN THE FIRST GROUP ITSELF IS ENTERED,AND THEN THE SECOND GROUP.
200' THE PROGRAM PRINTS OUT THE CHI SQUARE STATISTIC OF A 2 BY 2 TABLE
210' ON 1 DEGREE OF FREEDOM.
220' SAMPLE DATA IS IN LINE 900.
230'
240'
250' * * * * * * MAIN PROGRAM * * * * * * * * * *
260'
270 READ M, N
280 LET M1 = M + N
290 LET M2 = INT( M1/2 )
300 MAT READ A(M1)
310 LET L = 1
320 LET U = M
330 GOSUB 630
340 LET L = M + 1
350 LET U = M1
360 GOSUB 630
370 LET X = Y = 0
380 LET I = 1
390 LET J = M + 1
400 FOR K = 1 TO M2
410 IF A(I) < A(J) THEN 470
420 LET Y = Y + 1
430 LET J = J + 1
440 IF J <= M1 THEN 520
450 LET X = M2 - Y
460 GO TO 530
470 LET X = X + 1
480 LET I = I + 1
490 IF I <= M THEN 520
500 LET Y = M2 - X
510 GO TO 530
520 NEXT K
530 LET U = M - X
540 LET V = N - Y
550 LET Z = X*V - Y*U
560 LET T = M1*( ABS(Z) - M1/2 ) ^ 2
570 LET C2 = T / M / N / M2 / (M1 - M2)
580 PRINT "TWO SAMPLE MEDIAN TEST."
590 PRINT "GROUP 1 "; X; U
600 PRINT "GROUP 2 "; Y; V
610 PRINT "CHI-SQUARE = "; C2
620 STOP
630 FOR I = 1 TO U - L
640 LET X = A(L)
650 LET Q = L
660 FOR J = L + 1 TO U - I + 1
670 IF X >= A(J) THEN 700
680 LET X = A(J)
690 LET Q = J
700 NEXT J
710 IF J = Q THEN 740
720 LET A(Q) = A(J)
730 LET A(J) = X
740 NEXT I
750 RETURN
900 DATA 4, 6, 160, 160, 140, 190, 117, 145, 147, 120, 150, 120
910END