Unit 2 Stat Studies Review

Jane Goodall lived among wild chimpanzees intermittently for decades, studying their social and family systems while keeping her interaction with the chimpanzees to a minimum. Which study method did Jane conduct?

Ghala wanted to know what the most popular book was in the whole school, so she asked everybody in 11th grade what their favorite book was. Which research method is most appropriate?

• Sample Survey

• Census

• Experiment

• Hypothesis Test

The entire group studied.

The part of the population being studied

A researcher randomly assigned students to two groups. One group was assigned to watch a violent television program while the other group watched a nonviolent program. The student's behavior was then recorded for incidences of aggressive behavior. What type of study did the researcher conduct?

Identify the type of study being conducted

Determine if people who take vitamin C every day are less likely to get colds.

• Observational study

• Experiment

Identify each of the following as an observational study or an experiment.

Compare voter satisfaction levels between people assigned to use either paper ballots or touch‐ screen machines.

Identify each of the following as an observational study or an experiment.

Determine which brands of orange juice people prefer. The people are randomly chosen at the supermarket and are asked to taste both brands without knowing which brand they are drinking.

• Experimental

• Observational Study

For each situation, choose the most appropriate technique for collecting data. Use the technique exactly once.

Estimate the number of students in your school who play video games more than 10 hours per week.

Identify the sample method

Interview every 10th student who enters the school in the morning.