I know of 5 classmates that failed & they all passed the 2nd time around. 2 failed in the "Humanistic" portion while the other 3 in "data-gathering"
But, no matter what the %, the only one that matters is the one that you end up with i.e. pass or fail. Keeping that in mind just try & get some classmates to be fake patients, ask them for HONEST feedback & if possible, record it for later viewing w/ the professor that runs your SP class.