Measuring Associations

Students recorded the total number of pages and chapters in each of several books on the scatterplot. Based on the scatterplot, which is the best prediction of the total number of pages in a book with 4 chapters?

• 150 pages

• 140 pages

• 90 pages

• 120 pages

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?

• A) As the number of coffee shops increase, violent crimes appears to increase.

• B) The line of best fit (regression line) shows a positive correlation

• C) The data has a positive correlation coefficient

• D) An increase in coffee shops causes an increase in violent crimes

Rank these scatter plots according to the intensity of the correlation represented, from weakest to strongest.

• 1, 2, 3, 4

• 2, 4, 3, 1

• 4, 3, 2, 1

• 1, 3, 4, 2

What units will you be using to measure this liquid?

• Milileters

• Meters

• Apples

• Milimeters

How much liquid is in this graduated cylinder?

• 30 mL

• 35.5 mL

• 35 Apples

• Impossible to tell.

How much liquid is in this graduated cylinder?

• 60 mL

• 6.0 mL

• .60 mL

• 1.5 mL

What type of association (correlation) does this graph have?

• positive

• negative

• none

• all of the above

What type of association does this scatter plot show?

• positive linear association

• negative linear association

• no association

• nonlinear association

What type of association does this graph have?

• positive 

• negative

• none

• all of the above