1.

A statistical question is one for which we expect ___ in the answers.

consistency

variability

accuracy

2.

The question, "Do you like pizza?" is a statistical question.

True

False

3.

The question, "How many people live in each state?" is a statistical question.

True

False

What is the period of the sinusoidal function ?

How is the interquartile range calculated?

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