Scatter Plot Positive Correlation

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

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

• 15 hours

• 20 hours

• 25 hours

• 30 hours

If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit?

• There is a weak, positive relationship

• There is a strong, positive relationship

• There is a weak, negative relationship

• There is a strong, negative relationship

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

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• -1.409

• .164

A person’s height and a person’s age up to adulthood

• Positive Correlation

• Negative Correlation

• No Correlation

What type of Data Display is this?

• Line Graph

• Histogram

• Scatter Plot

• Bar Graph

Scatter plots are a good data display because...

• They show the percentage of the whole data set.

• They allow you to see a correlation from a set of imperfect data points.

____________ plots can have a positive or negative correlation.