so is the probability increased only if the bunt is successfully completed, or are you saying calling for a bunt with none out and a runner at 2nd will increase the expectancy of getting one run vs letting the batter hit away. Even when you call for a sacrifice, a player will not always execute and will record and not at advance the runner say 15 percent of the time or whatever it is, or even worse bunt it back to the pitcher and have the runner thrown out at third.
I don't really care that much and certainly don't care enough to look it up, but you guys seem like fat kids in a smartie factory when discussing this topic, so I thought I would further your fun.