structure.com/courses/11874/quizzes/61910/take D Question 16 2 pts A study was undertaken to study the relationship between exposure to polychlorinated biphenyls (PCBs) and reproduction among women occupationally exposed to PCBs during the manufacture of capacitors in upstate New York. To ascertain information on reproductive outcomes, interviews were conducted in 1982 with women who had held jobs with direct exposure and women who had never held a direct- exposure job. Data are summarized in the table below. Test to evaluate the effect of direct exposure (compared to indirect exposure) using weight gain during pregnancy and provide your t-test statistic value below in 3 decimal places. Exposure Direct (n=172) Indirect (n=184) Variable Mean SD Mean SD Weight gain during pregnancy 25.58 14.58 28.77 (lb) 14.65 Birth weight (g) 3,280 463 3,437 468 Gestational age (days) 278.0 16.5 276.0 16.1 Hint: Use the direct group as your group 1 (21 ) and the indirect group as your group 2 (2:2). Note: t