A deck of is of is Cards has five green cards labeled
through 5. five blue cares labeled I through 5,
and Five Cards tabeled l through 5.
a. You draw two cards from this deck, one after the
other, without replacement that is the probability
of drawing an blue card first them are red second?

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