A warehouse dispatcher is arranging the delivery of 83,000 condensers. She will
use 2 large-size trucks each carrying a
minimum of 18,000 condensers. The
remaining trucks are small-size trucks, each carrying a maximum of 7,000
condensers. Each truck she uses will
make exactly one trip. Along with the 2
large-size trucks, what is the minimum
amount of small-sized trucks needed to
deliver all of the condensers. Write and
solve an equation.

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