Start thinking about data collection plans

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Suppose that you would like to find out whether you react faster in the morning or in the evening. (You can use an online test like this one linked below to test your reaction times:  Human Benchmark Test ) (Links to an external site.)

For reasons that will be explained later in the course, you need samples of at least 30 trials at each time of day in order for the test to be valid. You have decided to do 40 trials at each time in case there are some outliers that need to be discarded.

You don't need to collect data right now, but you should start thinking about data collection plans that give data that is random and representative.

One possible plan for collecting data would be to repeat the test 40 times in one morning session and 40 times in one evening session.  

  • Give at least one possible problem with this plan. (Why would you not necessarily get data that is random and representative of your typical performance?)
  • Give at least one suggestion for improvement.  

If you feel that the questions above have been answered adequately by other students in the class, here is a new scenario. Suppose that, instead of comparing your own reaction times at different times of day, you would like to compare your reaction times with those of a friend. You repeat the test 40 times on one day, and your friend repeats the test 40 times on another day.

Reference no: EM132362763

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