Katherine randomly those one candy from a jar and put it back in the jar. She repeated this process many times. The table shows the number of times she chose each color of candy.

Color of Candy Number of Times
Red :12
Green :11
Yellow :12
Purple :8
Blue: 7

Based on the data in the table, what is the probability that the next piece of candy Katherine pulls out of the jar will be blue?

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