A set designer builds a model of the stage and the different pieces of furniture on it. He uses a scale of 5 cm to 1 m.
a) What is the ratio of a length on the model to
a length on the stage?
b) The length of a table is 1.4 m.
What is the length of the model?
c) The height of the model of a lamp is 3 cm.
What is the actual height of the lamp?
d) The height of the model of an ornament is 0.5 cm.
What is the actual height of the ornament?
How did you find out?

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