0.4 Correlation Research

What does a correlation look at?

• The relationship between two things

• The cause of an event

• The outcome of an experiment

• The process of data collection

Which of the following is an example of a positive correlation?

• As hours of study increase, grades tend to increase.

• As the number of hours spent watching TV increases, grades tend to decrease.

• There is no relationship between hours of study and grades.

• As hours of study increase, grades tend to decrease.

What does a correlation coefficient close to -1 indicate?

• Strong positive correlation

• Strong negative correlation

• No correlation

• Weak positive correlation

What is a scatterplot?

• A graphical representation of the relationship between two variables.

• A table showing the frequency of different outcomes.

• A bar chart representing categorical data.

• A line graph showing trends over time.

What is one thing that correlational studies can tell us?

• The exact cause of a relationship

• That two variables are related

• How to establish a cause-and-effect relationship

• The future outcomes of variables

What does a correlation coefficient close to 0 indicate?

• Strong positive correlation

• Strong negative correlation

• No correlation

• Weak negative correlation

Which of the following is an example of a negative correlation?

• As the temperature increases, ice cream sales increase.

• As the number of hours spent exercising increases, body weight tends to decrease.

• There is no relationship between temperature and ice cream sales.

• As the number of hours spent studying increases, grades tend to increase.