National university of singapore.

INSTRUCTIONS TO CANDIDATES 1. This examination paper contains FOUR (4) questions and comprises EIGHTEEN (18) printed pages. 2. This is a CLOSED BOOK examination. 3. Answer ALL questions. The total mark for this paper is 120. 4. Please show working steps and answers in the space provided for each question. DO NOT use pencils to write answers. Hand in this booklet at the end of the examination. 5. Only non-programmable and non-graphing calculators without remote communication function may be used. 6. The Standardized Normal Distribution Table (Z Table) and the Student’s tDistribution Table (t Table) are attached to this test paper for your reference.