This is the question if you can't see it A quarter of a shape is shown below . Two lines of symmetry are also shown

Questions

How many sides does the whole shape have?
What is the polygon name for the whole shape?
What would be the polygon name for the whole shape?
Up is the shape ! ​

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