Experiment Survey Observational Study

State whether the following in an example of a survey, experiment, or observational study. A researcher wanted to know if the student who took an SAT Prep Class scored higher than those who did not. The researcher split students into two groups. One group took the SAT prep class and the other did not. The researcher recorded the SAT scores after.

• Survey

• Experiment

• Observational Study

The city of Smyrna wants to know which brand of paint will last longer. They paint 2 streets with brand A and two streets with brand B and checked which lasted longer.

• Survey

• Observational Study

• Experiment

Researchers are investigating if girls type faster than boys. They record how long it takes for a SRS of 20 boys and 20 girls to type 500 words and compare the averages.

• Survey

• Observational Study

• Experiment

A teacher asks all her students five questions about their study habits.

• Survey

• Observational Study

• Experiment

Individuals are observed and variables are measured without controlling the individuals or the environment

• population

• observational study

• experiment

• secondary data

In an ________________, a researcher observes and measures characteristics of interest of part of the population but does not change existing conditions.

• Experiment

• Observational Study

Individuals are monitored for measures of variables of interest but not influenced in response.

• Observational Study

• Experiment

• Voluntary Response

• Single-Blind

Which scenario is best described as an observational study?

• For a class project, students in Health class ask every 10^th student entering the school if they eat breakfast in the morning

• A social researcher wants to learn whether or not there is a link between attendance and grades. She gathers data from 15 school districts

• A researcher wants to learn whether or not there is a link between children’s daily amount of physical activity and their overall energy level. During lunch at the local high school, she distributed a short questionnaire to students in the cafeteria

• Sixty seniors taking a course in Advanced Algebra Concepts are randomly divided into two classes. One class uses a graphing calculator all the time, and the other class never uses graphing calculators. A guidance counselor wants to determine whether there is a link between graphing calculator use and students’ final exam grades

You want to see if students who have a 4.0 grade point average study more than those who do not.

• experiment

• observational study

You want to compare the health of students who walk to school to the health of students who ride the bus

• experiment

• observational study