Scatter Plots Correlation Coefficient Residuals

A negative residual means...

• that the predicted value is too big

• that the predicted value is too small

• that the x value is too big

• that the x value is too small

A positive residual means...

• that the predicted value is too big

• that the predicted value is too small

• that the x value is too big

• that the x value is too small

What type of correlation is seen

• positive

• negative

• none

The residuals plot from a linear model is shown here.

The shape of the data indicates that the linear model is appropriate.

• TRUE

  because the plot is very linear

• FALSE

  because the plot is very linear

• TRUE

  because the slope is negative

• FALSE

  because the slope is negative

Shown is a residual plot. How many negative residuals are there?

• 5

• 1

• 3

• 9

A residual is the vertical distance between a data point and a line of fit.

• True

• False

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 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

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

• Graph A

• Graph B

• Graph C

• Graph D

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Which line is the best line of best fit?

• a

• b

• c

• i don't see any lines