StatTutor Lesson - Interpreting Scatterplots

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      Question 1

      247

      Question 1.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Correct. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Incorrect. Try again.
      2

      Question 2

      260

      Question 2.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 3

      269

      Question 3.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 4

      330

      Question 4.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Correct. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Incorrect. Try again.
      2

      Question 5

      333

      Question 5.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 6

      337

      Question 6.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 7

      409

      Question 7.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have negative slope, the direction is negative.
      Correct. Since a line drawn through the cloud of data will have negative slope, the direction is negative.
      Incorrect. Try again.
      2

      Question 8

      423

      Question 8.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 9

      445

      Question 9.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 10

      478

      Question 10.

      Is there a relationship between score and time?

      A.
      B.

      Incorrect. Since the cloud of data has no pattern, there is no relationship.
      Correct. Since the cloud of data has no pattern, there is no relationship.
      Incorrect. Try again.
      2

      Question 11

      509

      Question 11.

      Is there a relationship between age and weight/length ratio?

      A.
      B.

      Incorrect. Since the cloud of data has a curved pattern, there is a relationship.
      Correct. Since the cloud of data has a curved pattern, there is a relationship.
      Incorrect. Try again.
      2

      Question 12

      518

      Question 12.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Correct. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Incorrect. Try again.
      2

      Question 13

      522

      Question 13.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line drawn through the cloud of data does not follow the form, but a curved line drawn through the data does, the form is curved.
      Correct. Since a straight line drawn through the cloud of data does not follow the form, but a curved line drawn through the data does, the form is curved.
      Incorrect. Try again.
      2

      Question 14

      528

      Question 14.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the curved pattern is clearly visible, the strength is strong.
      Correct. Since the curved pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 15

      565

      Question 15.

      Is there a relationship between duration and time until the next eruption?

      A.
      B.

      Incorrect. Since the cloud of data seems to have a linear pattern, there is a relationship.
      Correct. Since the cloud of data seems to have a linear pattern, there is a relationship.
      Incorrect. Try again.
      2

      Question 16

      569

      Question 16.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Correct. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Incorrect. Try again.
      2

      Question 17

      572

      Question 17.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 18

      577

      Question 18.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 19

      617

      Question 19.

      Is there a relationship between blood alcohol content and sobriety test score?

      A.
      B.

      Incorrect. Since the cloud of data seems to have a linear pattern (with the exception of an outlier), there is a relationship.
      Correct. Since the cloud of data seems to have a linear pattern (with the exception of an outlier), there is a relationship.
      Incorrect. Try again.
      2

      Question 20

      622

      Question 20.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have negative slope, the direction is negative.
      Correct. Since a line drawn through the cloud of data will have negative slope, the direction is negative.
      Incorrect. Try again.
      2

      Question 21

      625

      Question 21.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 22

      633

      Question 22.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 23

      666

      Question 23.

      Is there a relationship between diamond size and price?

      A.
      B.

      Incorrect. Since the cloud of data clearly has a linear pattern, there is a relationship.
      Correct. Since the cloud of data clearly has a linear pattern, there is a relationship.
      Incorrect. Try again.
      2

      Question 24

      674

      Question 24.

      Is the direction positive or negative?

      A.
      B.

      Incorrect. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Correct. Since a line drawn through the cloud of data will have positive slope, the direction is positive.
      Incorrect. Try again.
      2

      Question 25

      685

      Question 25.

      Is the form linear or curved?

      A.
      B.

      Incorrect. Since a straight line can be drawn through the cloud of data, the form is linear.
      Correct. Since a straight line can be drawn through the cloud of data, the form is linear.
      Incorrect. Try again.
      2

      Question 26

      701

      Question 26.

      Is the strength strong or weak?

      A.
      B.

      Incorrect. Since the linear pattern is clearly visible, the strength is strong.
      Correct. Since the linear pattern is clearly visible, the strength is strong.
      Incorrect. Try again.
      2

      Question 27

      717

      Question 27.

      Can we use the relationship between size and price of diamonds to predict price of a 0.25 carat diamond?

      A.
      B.

      Incorrect. A .25 carat diamond is well within the range of observed x-values so we can predict its price.
      Correct. A .25 carat diamond is well within the range of observed x-values so we can predict its price.
      Incorrect. Try again.
      2

      Question 28

      733

      Question 28.

      Can we use the relationship between size and price of diamonds to predict price of a 2.0 carat diamond?

      A.
      B.

      Incorrect. A 2 carat diamond is quite a ways outside the range of observed x-values so predicting its price will give a bad prediction.
      Correct. A 2 carat diamond is quite a ways outside the range of observed x-values so predicting its price will give a bad prediction.
      Incorrect. Try again.
      2

      Question 29

      819

      Question 29.

      On the basis of this scatterplot, is there a “visual” relationship between date of birth and draft number?

      A.
      B.

      Incorrect. Since examining the scatterplot visually does not reveal a pattern in the cloud of data, we would say there is no relationship.
      Correct. Since examining the scatterplot visually does not reveal a pattern in the cloud of data, we would say there is no relationship.
      Incorrect. Try again.
      2