A researcher compares the scores of 1,000 randomly selected urban eighth grade students with 1,000 randomly selected rural eighth grade students on a 30-item test of mathematical understanding. The urban sample obtains a mean raw score of 12.6, while the rural sample obtains a mean raw score of 13.2. The standard deviation is 5.1. The difference between the mean scores is significant at the .05 level. Would you consider this difference to be of practical significance? Why or why not?
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