Sea divers are asked to dive the depth of 333 feet below sea level then rise to a depth of 50 feet below sea level . next they reach a depth of 780 feet below sea level , and then rise to a depth of 490 feet below sea level . list the depths of the divers in declining order

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