1 - As an analyst, we would like to perform a work sampling study on an assembly line. The jobs can be differentiated on the basis of the product size: A, B, and C. We perform a study over a five-week period that equals to 200 working hours. There are 12 workers to be examined. In total, we perform 1140 observations. Yet the worker absences led to 15 worker-day deduction from the total working hours where workers work 8 hour each day. The study results are tabulated below. Queston: What is the mean assembly time per product unit for size C? Category A B Others Number of observations 220 293 385 242 Number of units completed 600 1123 3025 (none) a) 0.0661 b) 0.0212 C) 0.7537 d) 0.2545 e) 0.0959