Which statements about experimental probability are true? check all that apply. experimental probability has the total number of trials in the numerator and the number of times an event occurs in the denominator. experimental probability is the same as theoretical probability. an experiment to determine probability will include a number of trials. a probability experiment will count the number of times an event occurs. experimental probability can be written in the form of a ratio?

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