Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.

Marianne wanted to know students' opinion on the new schedule at school. She survey's the first 30 students who come into her class.

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.

This is an example of:

A teacher hands out an index card and asks ALL of her students to write down the following information: age, height (in inches), and what grade they are in.

Which of the following best describes her method of data collection?

The president of a college randomly selects 2 students from each department to serve on a student advisory board.

All of the following are elements of a good experimental design except

What is the difference between an observational study and an experiment?

Why do we want our experiments to have random elements in them?

This research method is a technique for ascertaining the self – reported attitudes or behaviors of a particular group, usually by questioning a representative, random sample of the group.