In an experiment conducted online at the University of Mississippi, study participants are asked to react a stimulus. In one experiment, the participant must press a key upon seeing a blue screen. The time (in seconds) to press the key is measured. The same person is then asked to press a key upon seeing a red screen, again with the time to react measured. The results for six study participants are listed in the table.

(a) Which color has more dispersion using the range as the measure of dispersion?
(b) Which color has more dispersion using the standard deviation as the measure of dispersion?

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Participant Reaction Time Reaction Number Time to Red 0.408 0.407 0.542 0.402 0.456 0.533 to Blue 0.582 0.481 0.841 0.267 0.685 0.450 4