If those are your choices, statistics would likely be the most useful, since it would not look like you are repeating high school precalculus (assuming that you have not had high school AP statistics) or going backward from high school AP calculus, and knowledge of statistics is helpful in many college majors.
If you want to check your knowledge of precalculus concepts, you can try this quiz: http://www.math.buffalo.edu/rur/rurci3.cgi .