the problem with sums are that they are too generic... not easy to decode a sum into a set of 5 or 6 numbers...
and while most lottery databases only provide draw history in sequential order, draw history is more accurate because a sorted number could have been drawn several different ways. sorting is a process added AFTER the drawing and it should be remembered that it was done to make the numbers easier to read, it's not a true indication of what happened during the draw...
1-22-40-48-49 sorted order, could have been drawn as
1-22-40-48-49
22-49-1-48-40
48-40-49-1-22
49-40-1-48-22
etc... sequential data is easier to analyze, but leads to very subjective results.
for example... most frequently drawn number (by position)
sorted order (powerball 5 white balls) 02--17--27--42--52
drawn order (powerball 5 white balls) 09--14--06--46--26
powerball is just one ,in either case most frequent (statistical MODE) is 20
sorted order imparts a "weight" to the number on the ball, which honestly does not exst other than to identify the ball... position at start (before they are dropped into the bin) is much more accurate... if a 10 is drawn more than a 22, it has nothing to do with the value of the number painted on the ball, rather... the starting position may make the 10's appearance more favorable.
any stats gleaned from sorting are subjective, you could spin them any way you want... sums, high/low, odd/even...
here's another example... positional number boundaries... (powerball)
Sort order
First ball 1 to 32
2nd ball 2 to 45
3rd ball 6 to 50
4th ball 9 to 51
5th ball 10 to 53
Draw order
First ball 1 to 53
2nd ball 1 to 53
3rd ball 1 to 52
4th ball 2 to 53
5th ball 1 to 52
in both cases, Powerball is 1 to 42.. all based on the 101 drawings since 5/53 + 1/42.
true, sorted order makes it easier to spot trends, but it also makes it easier to spot false trends