Given the age of the paper (2012), it may not be on official college portals. However, top-tier tuition centers and online forums (like SGExams or TheStudentRoom archives) often maintain a repository of "legendary papers."
A warning: Be cautious of unofficial solutions. The 2012 paper's vector question has been solved incorrectly by many amateurs. Cross-reference two sources if possible. 2012 njc prelim h2 math
Likely: One-tailed or two-tailed z-test or t-test, including Type I/II errors. Given the age of the paper (2012), it
NJC 2012 common: Stated significance level, test proportion, find smallest sample size for given power. A warning: Be cautious of unofficial solutions
Example: H0: p=0.5 vs H1: p>0.5, n=100, observed 60 successes. Test at 5%.
The Statistics half of the 2012 NJC Prelim H2 Math paper was a masterclass in "reading comprehension under pressure."