Processing math: 100%

StatTutor Lesson - Residuals

true
Stat Tutor
true
true
You have completed 0 question sequences out of 6.
Residuals BPS6e
Video Player is loading.
Current Time 0:00
Duration 0:00
Loaded: 0%
Stream Type LIVE
Remaining Time 0:00
 
1x
    • Chapters
    • descriptions off, selected

      Question 1

      51

      Question 1.

      Do all of the data points lie on the regression line or are there errors?

      A.
      B.

      Correct. Since the data points do not all lie on the regression line, we have prediction errors.
      Incorrect. Since the data points do not all lie on the regression line, we have prediction errors.
      2
      Try again.

      Questions 2-6

      98

      Question 2.

      Visually, what is a residual?

      A.
      B.
      C.

      Correct. Residual is defined as the vertical distance a data point is from the regression line.
      Incorrect. Residual is defined as the vertical distance a data point is from the regression line.
      2
      Try again.

      Question 7

      138

      Question 7.

      Fill in the blank: A residual plot is a ____________ of the x-values plotted against the residuals.

      A.
      B.
      C.

      Correct. This is a correct description of what a residual plot is.
      Incorrect. This is a correct description of what a residual plot is.
      2
      Try again.

      Question 8

      205

      Question 8.

      What pattern in a residual plot indicates that conditions are met?

      A.
      B.
      C.

      Correct. When the pattern of points in a residual plot forms a shoebox, we know there are no problems with the conditions.
      Incorrect. When the pattern of points in a residual plot forms a shoebox, we know there are no problems with the conditions.
      2
      Try again.

      Questions 9-10

      280

      Question 9.

      What is the purpose of a residual plot?

      A.
      B.

      Correct. A residual plot is just a diagnostic tool for finding problems with the conditions.
      Incorrect.A residual plot is just a diagnostic tool for finding problems with the conditions.
      2
      Try again.

      Question 11

      410

      Question 11.

      True or false: These outliers will not have any effect on the values of slope and y-intercept.

      A.
      B.

      Correct. Since sample means and sample standard deviations are used to find slope and y-intercept and they are all affected by outliers, slope and y-intercept are also affected by outliers.
      Incorrect. Since sample means and sample standard deviations are used to find slope and y-intercept and they are all affected by outliers, slope and y-intercept are also affected by outliers.
      2
      Try again.

      Applet

      424