Scatterplots, correlation & causation

What type of association does this scatter plot represent?

• positive linear association
• negative linear association
• no association
• nonlinear association

Based on the graph, if Joe earned $400, how many hours did he work?

• 15 hours
• 20 hours
• 25 hours
• 30 hours

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases
• As x increases, y increases
• As x decreases, y decreases

What would the correlation be between math grades and the time it takes to run a mile ?

• Postive Correlation
• Negative Correlation
• No Correlation
• Cannot Be Determined

In a scatterplot of the average grade point of a high school student and the average hours that he/she spend on his/her homework, you expect to see:

• very little association
• a strong association
• a weak positive association
• a strong positive association

What are scatter plots used for?

• To display the relationship between three variables

• To display the relationship between two variables

• To display the relationship between four variables

• To display the relationship between five variables

What type of correlation does this scatter plot show?

• moderate positive

• moderate negative

• strong correlation

• no association

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

What type of association does this graph have?

• strong positive

• strong negative

• weak positive

• no association

What type of association does this graph have?

• weak positive 

• weak negative

• none

• strong negative