Toxaphene is an insecticide that has been identified as a pollutant in the Great Lakes ecosystem. To investigate the effect of toxaphene exposure on animals, groups of rats were given toxaphene in their diet. A study reports weight gains (in grams) for rats given a low dose (4 ppm) and for control rats whose diet did not include the insecticide. The sample standard deviation for 20 female control rats was 31 g and for 19 female low-dose rats was 55 g. Does this data suggest that there is more variability in low-dose weight gains than in control weight gains? Assuming normality, carry out a test of hypotheses at significance level 0.05. State the relevant hypotheses. (Use σ1 for low-dose treatment and σ2 for control condition.) H0: σ12 = σ22 Ha: σ12 ≥ σ22 H0: σ12 = σ22 Ha: σ12 < σ22 H0: σ12 = σ22 Ha: σ12 ≠ σ22 H0: σ12 = σ22 Ha: σ12 > σ22 Calculate the test statistic. (Round your answer to two decimal places.) f = What can be said about the P-value for the test?