When you get your copy of tiger, I image that an SQLite command-line shell will be included. (I do not know this; I'm just guessing.) So start up a command-line shell and type:
select sqlite_version();
That will tell you right away what version is being used. I do not know, but I suspect they did their final builds of Tiger with 3.1.5.
I've got a near-final copy of Tiger here, and I'm seeing:
bin/sqlite3 SQLite version 3.1.3
Enter ".help" for instructions
sqlite> select sqlite_version();
3.1.3
cheers! ========================================================================== "A cat spends her life conflicted between a deep, passionate and profound desire for fish and an equally deep, passionate and profound desire to avoid getting wet. This is the defining metaphor of my life right now."