A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seatbelt.

• Observational Study

• Experiment

Tags

CCSS.HSS.IC.B.3

A professor finds that people who are obese have higher cholesterol levels than those who are not obese.

• Observational Study

• Experiment

Tags

CCSS.HSS.IC.B.3

A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seatbelt. What is the explanatory variable?

• car color

• wearing seatbelt or not

Tags

CCSS.HSS.IC.B.3

A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seatbelt. What is the response variable?

• car color

• wearing seatbelt or not

Tags

CCSS.HSS.IC.B.3

A survey is _____________

• an observational study
• an experiment

Tags

CCSS.HSS.IC.B.3

Which of the following is a key distinction between well designed experiments and observational studies?

• More subjects are available for experiments than for observational studies.

• Ethical constraints prevent large-scale observational studies.

• Experiments are less costly to conduct than observational studies.

• An experiment can show a direct cause-and-effect relationship, whereas an observational study cannot.

• Tests of significance cannot be used on data collected from an observational study.

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.ID.C.9

Factors that cause differences between the experimental group and control group other than the independent variable. 

• control group
• population
• confounding variables

The factor the researcher manipulates in a controlled experiment

• dependent variable
• independent variable
• confounding variable

A psychological or physical treatment given to the control group that resembles the treatment given to the experimental group, but that contains no active ingredient. 

• independent variable
• placebo
• dependent variable

When respondents know – or suspect – the sponsor or subject of the research, their feelings and opinions may bias or alter their answers.  This is known as

• Confirmation Bias
• The Halo Effect
• The Hawthorne Effect
• Culture Bias