Vincent is investigating employee absenteeism at the Wine (population 1) and the Beer (population 2) Factories. Past investigations demonstrate no distinction in employee absenteeism at the two factories. (The mean number of days missing per employee was the equivalent at every factory.) His staff randomly selected personnel records of 49 employees from each factory, and reported the following: 1 With a two-tail test and a = = 7 days and 2 8days. Assume that o, = 1 and a2 = 2. %3D %3D %3D 0.01, the observed z-value is Select one: O A. -4.04 B. -3.13 C. -9.80 O D. -16.33