Researchers conducted experiments with trees. Listed below are weights (kg) of t

Question

Researchers conducted experiments with trees. Listed below are weights (kg) of trees given no fertilizer and trees treated with fertilizer and irrigation. Find the and standard deviation for each of the two samples, then compare the two sets of results. Does there appear to be a difference between the two standard Find the range for the trees that were given no treatment. Range = kg Find the range for the trees treated with fertilizer and irrigation. Range = kg Find the sample standard deviation for the trees that worn given no treatment. Sample standard deviation = kg Now find the sample standard deviation for the trees treated with fertilizer and irrigation. Sample standard deviation = kg Is there a difference between the two standard deviations? A. Yes, the treated trees appear to have weights that vary much less than the weights of the trees with no treatment. B. Yes, the trees with no treatment appear to have weights that vary much less than the weights of the treated trees. C. No, there is not a difference between the two standard deviations as both values are very small.

Explanation / Answer

for no treatment Range =0.16 Kg

for fertilizers and irrigation range =1.42 Kg

for no treatment sample std deviation =0.065 Kg

for fertilizers and irrigation sample std deviation =0.593 Kg

option B is correct

no treatment fertilizer and irrigation 0.32 1.04 0.24 1.13 0.19 1.26 0.24 1.15 0.35 2.46 minimum 0.19 1.04 maximum 0.35 2.46 range=max-min 0.16 1.42 sample std deviation 0.065 0.593

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