An investor has an account with stock from two different companies. Last year, her stock in Company A was worth $1060 and her stock in Company B was worth $4290.
The stock in Company A has increased 15% since last year and the stock in Company
B has increased 20%. What was the total percentage increase in the investor's stock
account? Round your answer to the nearest tenth (if necessary).

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