1. (sampling/statistics) in a population of 120 voters in "random town", suppose 40% will vote for phred for mayor. if you randomly sample 25 voters (without replacement) before the election, what’s the chance that the number in the sample who will vote for phred will be between 9 and 11 (i. e., within 4% of the true value)? do this using the e

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