<p>This is a good idea, we are calculating a running average, which is more useful than finding the average after 100 posts or so.</p>
<p>In fact, the original way of finding a running average posted by hp is almost correct. He just stated it in an ambiguous way that could cause an off-by-one error. (To borrow programing terminology) To restate it, we can find the running average by
current average + (your score - current average) / number of scores, including yours. This is logically equivalent to (average*number of people+your score)/(number of people plus u). So we could do it either way.
I shall do it the former way. There are already 7 scores, so
1384 + (1580-1384)/8 = 1408.5.
Also state the number of scores already posted, so the next poster know which number to increment. Current number of scores = 8.</p>
<p>I saw that too, and I just corrected my post. BTW I don't think we need to use the correct number of significant figures here, since we can consider all of these constants (I know, I know, the irony) So we can keep this as precise as possible.</p>
<p>Well, I assumed that the intelegentsia that is CC would know that they include themselves when they divide, because they are adding THEIR score.</p>
<p>Perhaps a little PHP script to do the trick using gd libraries?</p>
<p>LOL...we would hope so. But we have the person who did the wrong order of operations, and several other people who refuted a perfectly good way of doing the average. (No offense)</p>
<p>Hurray, I just brought the CC average up 16 points! (Lol, I just took the January SATI, and I finally get to be the jerk who posts his 1600 for once :))</p>