Answer choices: simulation, experiment, survey/poll, observational study

Read each scenario and identify the method used for collecting data. 1. The department of public safety wants to reduce the amount of distracted driving and wonder if more public service announcements would help reduce this. They collect data on the number of traffic incidents tied to distracted driving on one road for a month. Then, they put out TV and radio commercials warning of the dangers of distracted driving. After that, they collect data on the number of distracted-driving related incidents that occur on this same road. Which method does this describe? 2. A national company wants to know if employees would be more productive if they were allowed to bring their pets to work. They randomly choose their offices in the Northeast and Southwest and allow all of the employees to bring pets to work. Offices in the Northwest and Southeast will not be allowed to bring pets to work. Productivity levels for the regions of the US will be measured. Which method does this describe? 3. A hospital records medical personnel's reaction time and organization during a natural disaster. 4. A supervisor wanted to know if workers who had fewer errors at work also had fewer accidents. He accessed company records to compare the number of errors and accidents. Which method does this describe