Experiments & Surveys

Rasheed wants to know how the students at his school rate the cafeteria. He surveyed his school's basketball team to rate the school cafeteria. Is this a biased sample of the school's population?

• Yes, because it's a voluntary survey

• Yes, because it is a convenience survey

• No, the basketball team is representative of the population

• No, because it is an SRS

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

In order to assess the effects of exercise on reducing cholesterol, a researcher sampled 50 people from a local gym who exercised regularly and 50 people from the surrounding community who did not exercise regularly. They each reported to a clinic to have their cholesterol measured. The subjects were unaware of the purpose of the study, and the technician measuring the cholesterol was not aware of whether subjects exercised regularly or not. This is

• an experiment

• an observational study

Tags

CCSS.HSS.IC.B.3

210 college students were randomly assigned to play either a violent or nonviolent video game. A short time later, the students were presented with the opportunity to trivially harm another person and results comparing the two groups were recorded.

Is this study OBSERVATIONAL or EXPERIMENTAL?

• Observational

• Observational

One day, Ms. Senneseth wants to estimate how many students did their HW. She draws from her card deck and gets a "1" and a "5". She then asks all the students at Table 1 and all the students at Table 5. This sampling technique is called?

• Stratified

• Cluster

• Simple Random Sample

• Systematic

Tags

CCSS.HSS.IC.B.3