The activity in Part C provides an opportunity to consider the full statistical problem-solving process, with the primary focus on collecting the data. Useful data depend on an appropriate measurement/collection design, and you will have the opportunity to devise your own method of measurement. The activity asks you to consider several design options, and, in doing so, you will investigate such important ideas as randomization, blocking (pairing), and the effects of order.
After completing the memory experiment in Part C, consider conducting your own memory experiment to determine whether your results confirm the results in our example. One option is to use the Interactive Activity in Session 1, Part C, and reexamine the distance perception phenomenon. A paired design similar to the one used for the memory experiment could be used to compare subjects' length perception of line segments with arrows to their length perception of line segments without arrows.
Fathom Software, used by the onscreen participants, is helpful in creating graphical representations of data. You can use Fathom Software to complete Problems C7-C8, as well as Problem H1. For more information, go to the Key Curriculum Press Web site at http://www.keypress.com/fathom/.
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