The graph shows how many trees a logging company replanted after working in an area. The figure shows the graph of a ray in the first quadrant of a coordinate plane. The graph is titled replanted trees. The x axis is labeled time in acres, and the y axis is labeled number of trees. The x axis ranges from 0 to 10 in increments of 1, and the y axis ranges from 0 to 500 in increments of 50. A ray extends from the y-axis through the points begin ordered pair 3 comma 135 end ordered pair and begin ordered pair 5 comma 225 end ordered pair

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias