PLZ HELP IM TWO WEEKS BEHIND THE SCHOOL CALLED MY MOM Which describes dependent events?

drawing a blue marble and a yellow marble at the same time from a bag of marbles

drawing the ace of spades from a deck of cards, putting it back into the deck, and
drawing the king of spades.

rolling a six-sided number cube and getting an even number, then rolling the same six-sided number cube and getting an even number again

flipping two coins at the same time and getting heads on one and tails on the other

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