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The average length of crayfish from stream A is 10 cm. The average length of crayfish from stream B is 6 cm. What additional information

The average length of crayfish from stream A is 10 cm. The average length of crayfish from stream B is 6 cm. What additional information is needed to determine if there is a significant difference between the average length of crayfish in stream A and the average length of crayfish in stream B? the location of the streams the species of the crayfish the standard deviation for all measurements The average rainfall of the region the flow rate of the streams

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