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Home > CC4 > Chapter 7 > Lesson 7.2.3 > Problem 7-111

7-111.
  1. This problem is a checkpoint for interpreting associations. It will be referred to as Checkpoint 7. Homework Help ✎

  2. VO2max
    (ml/kg/min)

    Power
    (watts)

    54

    292

    51

    362

    49

    280

    43

    293

    53

    280

    59

    413

    64

    358

    58

    293

    56

    342

    55

    335

    checksum
    542

    checksum
    3248

    A random sample of competitive cyclists had their maximum sustainable power output (watts) versus VO2max tested. Their data is shown in the table below. Note: VO2max, also called “aerobic capacity”, is a measure of how much oxygen your body uses when exercising at a maximal effort for an extended period of time.

    1. Create a model by finding the LSRL. Sketch the graph and the LSRL.

    2. What power does the model predict for the cyclist that has a VO2max of 43 ml/kg/min? Consider the precision of the measurements in the table and use an appropriate precision in your result.

    3. Find the residual for the cyclist in part (b).

    4. Find the correlation coefficient and interpret it.

    5. Describe the association. Provide numerical values for direction and strength and interpret them in context.

  3. Check your answers by referring to the Checkpoint 7 materials.

Answers and extra practice are located in the back of your printed textbook or in the Reference Tab of your eBook.
If you have an eBook for INT1, login and then click the following link: Checkpoint 7 Answers and Practice