After finishing her shift, a waitress wrote 2.5 under "hours worked" on her time card. how long did sje work?

What is the first step of an indirect proof of a number that is divisible by two

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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