Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
04-BS-2 Probability and Statistics — National Examination, May 2018. Closed book (approved calculator + one hand-written information sheet); any 5 of 8 questions constitute a complete paper (only 5 marked) — all 8 are solved below as a complete study resource.
Reference texts: Walpole, Myers, Myers & Ye, Probability and Statistics for Engineers and Scientists (9th ed.), Pearson — used throughout for point-estimation, confidence-interval, and hypothesis-testing formulas; Montgomery & Runger, Applied Statistics and Probability for Engineers, for the regression and correlation-inference formulas in Question 8.
