Explain the purpose of public opinion polls. Describe several ways in which a sample can be conducted. Which is the most effective? Why?

If you plan to exit an expressway after a short period of time, you should drive in a . a. left lane b. center lane c. right lane

Which of the following is not an indication of being drowsy? a. heavy eyelids b. excessive blinking c. irritability d. joint pain

Sleep hygiene is a. brushing your teeth before bed b. making sure your sheets are clean c. practicing good habits to make sure you're rested and alert d. seeing a sleep doctor to understand clean sleeping