RESEARCHERS at a university conducted experiments with poplar trees. Listed below are weights (kg) 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?
No treatment: 0.15 0.02 0.16 0.37 0.22
fertilizer and irrigation: 2.03 0.27 0.92 1.07 2.38
What is the varianceand the standard deviationfor each of the two samples?
The solution determines whether there is difference between the two standard deviations of the treatment effect or not.