I got a d for precal last year and this year as a junior im taking stats. Should i retake precal this year to change my grade? Or stay in stats?
If you do not want the D to be included in your GPA, you need to retake the class. Pre-Calc is not a Pre-requisite for Stats, but doing well in Pre-Calc with a clear understanding is very important if you plan to continue on to Calculus in HS or college.
Agreed with @Gumbymom
Fixing that D will definitely benefit you in the future, whether you want to apply to colleges next year, take Calculus in the future, or apply to some scholarships!