Casual vs Correlation

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

A line of best fit has been drawn on the scatter plot below. The relationship between these variables can be described as having

• negative correlation

• no correlation

• positive correlation

• zero correlation

The situation has correlation. Does it represent causation or just correlation?

The number of cars traveling over a busy holiday weekend and the number of accidents reported.

• Correlation

• Causation

Which of the following statements shows a relationship that is correlated but NOT casual?

• The amount of rainfall received and the level of water in a lake.

• The number of lights left on each day and the amount of the electric bill.

• The increase in warm, sunny days and the number of ice cream trucks visible.

• The number of hours worked and how much money is made.

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

Which of the following statements shows a casual relationship and not just a correlated one?

• An individual's decision to work in construction and his diagnosis of skin cancer.

• A decrease in temperature and the increase in attendance at an ice skating rink.

• As a child's weight increases so does its vocabulary.

• The number of minutes spent on exercising and the amount of calories burned.

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

If there is NO correlation, the correlation coefficient is ____. 

• 1

• -1

• 0

Which of the following statements shows a causal relationship and not just a correlated one?

• An individual's decision to work in construction and his diagnosis of skin cancer. 

• A decrease in temperature and the increase in attendance at an ice skating rink. 

• As a child's weight increases so does her vocabulary. 

• The number of minutes spent exercising and the amount of calories burned. 

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above