GROUP DIFFERENCES
TO SEE IF THE GROUPS SHOT WITH TWO LOADS HAVE DIFFERENT ACCURACY;
SHOOT THE SAME NUMBER OF GROUPS WITH EACH LOAD;
MEASURE EACH GROUP;
FIGURE THE AVERAGE GROUP SIZE FOR EACH LOAD
DIVIDE LARGER AVERAGE/SMALLER AVERAGE, GET “TEST RATIO”,
LOOK UP THE TABLE ENTRY.
IF TEST ENTRY > TABLE ENTRY, WE ARE ~ 95% SURE THAT THE LOAD ACCURACIES ARE DIFFERENT.
IF TEST ENTRY < TABLE ENTRY, WE ARE NOT~ 95% SURE THAT THE LOAD ACCURACIES ARE DIFFERENT.
EXAMPLE: SHOTS / GROUP = 5, FOR 15 GROUPS SHOT WITH EACH LOAD.
THE TABLE ENTRY IS 1.11.
DIVIDE LARGER AVERAGE/SMALLER AVERAGE, GET “TEST RATIO”.
IF TEST RATIO > TABLE ENTRY, EX:1.18, WE ARE ~ 95% SURE THAT THE LOAD ACCURACIES ARE DIFFERENT.
IF TEST RATIO < TABLE ENTRY, EX: .98, WE ARE NOT ~ 95% SURE THAT THE LOAD ACCURACIES ARE DIFFERENT.