1. Researchers compared the reaction times in people who were sleep-deprived versus people who had gotten a full night's rest. The following are typical data showing the reaction time scores (in seconds) for two groups (samples) of participants. (15 points)

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Sleep deprived Well Rested

3 4 2 3 8 3 1 2 2 1

6 1 9 2 10 1 2 3 3 4

10 2 3 5 4 2 2 1 3 2

1. Compute the mean, the range, the variance, and the standard deviation for each group.
2. Is one group of scores more variable than the other?