24. The system of claim 23 , wherein the one or more storage devices further store instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: determining a low-end value for the scores of the intermediate training records; identifying a second intermediate training record having a score less than the low-end score; and changing the score of the identifier second intermediate training record to be the low-end score.
23. The system of claim 19 , wherein the one or more storage devices further store instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: determining a high-end score for the scores of the intermediate training records; identifying an intermediate training record having a score greater than the high-end score; and changing the score of the identified intermediate training record to be the high-end score.