Bivariate and Univariate Data Revision

The correlation coefficient of -0.95 implies

• strong positive association

• weak negative association

• weak non-linear association

• strong negative association

Which of the following statements is correct?

• explanatory variable is graphed on the x axis and response variable is graphed on the y axis.

• Scatter plots can be used to describe relationships between categorical data.

• Explanatory variable should be on the y axis

• Response variable should be on the x axis

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• Weak Positive

Identify the explanatory variable

• Hours of Sleep

• Test Score

The amount of time studying for your next test and the grade you make on it. Which is the response variable?

• Amount of time studying for your next test

• Grade you make on test

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Make a prediction for a resting heart rate after 6 hours of exercise a week.

• 6
• 50
• 55
• 80

Which sentence describes the relationship shown on this scatterplot?

• 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

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D