Researchers at Pennsylvania State University conducted experiments with poplar trees. Listed below are weights (in kilograms) of poplar trees given no treatment and poplar trees treated with fertilizer and irrigation. Does there appear to be a difference between the two standard deviations?

Find the range and standard deviation for each of the two samples and then compare the two sets of results.

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Notreatment 0.15 0.02 0.16 0.37 0.22 Fertilizerandirrigation: 2.03 0.27 0.92 107 2.38