The function W gives the temperature, in degrees Fahrenheit, of a pot of water on a stove t minutes after the stove is turned on. After 30 minutes, the pot is taken off the stove. 1. Is 250 in the range of function W? Explain how you know

2. Describe the range of the function

3. Does W(t)=0 have a solution? Explain how you know

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