StatTutor Lesson - Regression lines

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StatTutor: Regression Lines
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      Questions 1-3

      138

      Question 1.

      After collecting your data, what is the first thing you should do?

      A.
      B.
      C.

      Incorrect. After collecting data, the first thing you should always do is plot your data. In regression we can decide whether the relationship is linear and whether there are outliers from the scatterplot.
      Correct. After collecting data, the first thing you should always do is plot your data. In regression we can decide whether the relationship is linear and whether there are outliers from the scatterplot.
      Incorrect. Try again.
      2

      Questions 4-7

      211

      Question 4.

      True or false: slope=riserun

      A.
      B.

      Incorrect. This is a correct statement.
      Correct. This is a correct statement.
      Incorrect. Try again.
      2

      Questions 8-9

      236

      Question 8.

      What is an important use of a regression line?

      A.
      B.
      C.

      Incorrect. We often use a regression line for prediction.
      Correct. We often use a regression line for prediction.
      Incorrect. Try again.
      2