Age versus Reaction Time

(Data courtesy Paul Cobb, Koeno Gravemeijer, and Kay McClain)

The reaction time of these subjects was tested by having them grab a meter stick after it was released by the tester. The number of centimeters that the meter stick dropped before being caught is a direct measure of the person’s response time.

• Plot these data on the attached sheet. Use the vertical segments as if they are number lines; place a dot on a segment to show the reaction times for people of various ages.
• The values under "age" are in years. The values under "Reaction Time" are in centimeters.

Questions:

1. Must you use the same minimum and maximum values for all segments on which you plot data?
2. Are there any ways this data might be pre-processed that would make it easier to complete this task?
3. Do you see any patterns in this data?
4. Can this data be considered a sample? If so, from what population? What questions would you ask about this data when you think of it as a sample that you wouldn't ask otherwise?

 Age Reaction Time Age Reaction Time Age Reaction Time 10 28.34 20 9.09 80 27.48 50 14.09 80 22.62 20 4.81 10 28.31 60 25.09 60 20.46 80 26.48 80 26.48 50 17.71 10 27.91 50 19.13 80 25.8 70 26.67 30 15.73 40 14.38 50 18.42 20 18.37 40 10.62 30 11.62 70 22.3 80 21.26 30 18.59 50 16.89 50 16.07 60 20.27 90 27.59 50 23.49 60 23.56 50 22.44 50 15.71 30 12.15 70 20.42 10 29.06 20 20.27 30 18.98 50 30.86 30 6.16 60 21.91 70 24.6 40 11.18 60 26.96 70 27.98 80 25.8 20 13.37 40 17.85 20 14.2 50 19.84 50 20.02 70 25.09 20 12.2 30 9.53 30 10.63 10 28.0 40 16.9 40 13.24 70 26.6 10 26.05 60 26.51 80 24.56 20 7.81 70 23.98 90 27.44 60 22.31 40 14.18 10 27.31 30 17.23 20 6.0 80 23.3 40 20.66 30 12.15 90 26.08 80 26.02 70 26.3 90 27.14 40 16.1 10 30.99 90 28.6 60 22.13 90 26.88 90 28.63 90 27.74 70 20.55 60 19.73 10 29.81 40 18.45 20 8.03 60 20.98 50 19.42 90 26.6 90 26.14 10 29.71