This composite shape has an area of 101 cm². What is the height of the trapezoid?

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cm

Image shows a composite figure made of a rectangle with a trapezoid on top of it. The rectangle has a base of 13 centimeters and a height of 5 centimeters. The trapezoid on top of it has a top base of 11 centimeters. The top and bottom base of the trapezoid are parallel. The rectangle has 4 right angles marked.

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