10 MODE8:DIM:GOSUB500:c$=CHR$(5):k=0:x=0:DEFCHR$(254)="424C300806"
20 CLS:PRINT"Cumulative frequency  P(x,“)";
30 z=k:s$="“":GOSUB400:k=z:IFk<0 THEN30
40 z=x:s$="x":GOSUB400:x=z:IFx<0 ORFRACx<>0 THEN40
60 LOCATE0,1:PRINTc$;".....";
70 sr=0:GOSUB"LIB0:S6320":GOSUB500:IFsr THEN*
75 IFs THENs=ROUND(s,LOG(ABSs)-6)
80 PRINTc$;"p=";s;:z$=INPUT$(1,@):GOTO30
400 LOCATE0,1:PRINTc$;s$;"=";z;"?";:INPUT@10;z:LOCATE0,0:RETURN
500 ONERRORGOTO510:RETURN
510 IFERR=1 THENCLS:ONERRORGOTO0
520 IFERL=400 THENRESUME400
530 LOCATE0,1:PRINTc$;"not found";:z$=INPUT$(1,@):RESUME20