Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams, December 2019 — 18-Env-B7, Environmental Sampling and Analysis (3 hours, closed book, approved Sharp or Casio calculator, F-distribution table supplied with the paper). The paper instructs "answer all 5 questions"; this solution answers all 5 in full, with every sub-part addressed.
Reference texts: Walpole, Myers, Myers & Ye, Probability & Statistics for Engineers and Scientists (sampling designs, hypothesis tests, EDA, ANOVA); Davis & Cornwell, Introduction to Environmental Engineering, ch. 2 (sampling protocol, QA/QC, monitoring program design); Gilbert, Statistical Methods for Environmental Pollution Monitoring (environmental data characteristics, censored data, monitoring design).
