review observational &experimental survey

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. Which research method is most appropriate?

• experimental

• census

• sample survey

• observational study

Tags

CCSS.HSS.IC.B.3

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 research method is most appropriate?

• biased study

• census

• experiment

• observational study

Tags

CCSS.HSS.IC.B.3

State whether the situation represents an experimental study or an observational study.

Suppose you are trying to determine if tutoring is being used effectively at Tri-C. You look at the academic records of 1000 students and compare that to the tutoring center login records.

• Observational study

• Experimental study

Answer explanation

This is an observational study. There is no treatment and the academic records are compared to tutoring logins. There is no randomization of the students.

Tags

CCSS.HSS.IC.B.3

Ken wants to compare how many hours a week that sixth graders spend doing mathematics homework to how many hours a week that eleventh graders spend doing mathematics homework. He randomly selects ten sixth graders and ten eleventh graders and records how many hours each student spent on mathematics homework in a certain week.

What study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

A large high school wants to know the proportion of students who currently arrive to school on time. Academy Administrators asked a random sample of 𝟐𝟎𝟎 students about their arrival times.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

Dr. Larson was interested in whether classical music helps students perform better on a test. Dr. Larson randomly assigned half of the study's participants to a group that listened to classical music while taking a test. The other half of the participants did not listen to music while taking a test. Which research method is most appropriate?

• sample survey

• experiment

• observational study

• census

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.5

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

• Biased Sample

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

To test the effects of eating breakfast on test grades. I randomly select half of my students and feed them breakfast while giving the other half nothing to eat. I then give them all a test and compare the test grades of each group.

Is this an experiment or an observational study?

• Experiment

• Observational study

• Neither

• Both experiment and observational study.

Tags

CCSS.HSS.IC.B.3

The response variable is:

• The variable we expect to explain or predict the value of the explanatory variable.

• Sometimes called the independent variable (IV)

• The variable we expect to change in response to the explanatory variable

• Also known as EV

Tags

CCSS.HSS.IC.B.5

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Which of the following is true?

• We use the response variable to explain changes that might be observed in the explanatory variable.

• The explanatory variable is the variable we expect to be explained by the response variable

• The response variable is also known as the predictor variable

• The explanatory variable is used to explain or predict the value of the response variable

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7