Let's say I end up with 90% from my school assessments, the next highest mark is 80% and the lowest mark is 50%. We sit the HSC exam, I don't do as well as I should and the highest mark achieved by someone at my school is 95 and the lowest is 75. I'm going to get an internal mark of 95, the person that came last is going to get an internal mark of 75 and the person that came second is going to get an internal mark somewhere around 85. Correct?
Now, if instead of beating everyone by 10% I get 81%, second gets 80% and last gets 50% and the marks again range from 95 to 75 with everyone getting the same marks as they did in the above example. I'm going to get an external mark of 95, the person in second's going to get ~94 and the person who came last is going to get 75. Clearly, the marks for people that came near the top are much higher in this example than the previous one and are much closer to what they scored in the external exam, with the only thing that's changed being my performance in school assessment tasks.
In essence, what I'm asking is whether or not outliers in the school marks are taken into account when calculating the actual internal marks.
EDIT: The reason I'm asking is that I'd feel really bad if I smash school assessment tasks, bomb the HSC and end up screwing everyone else over because of it.