48. The production of large electrical transformers and capacitators requires the use of polychlorinated biphenyls (PCBs), which are extremely hazardous when released into the environment. Two methods have been suggested to monitor the levels of PCB in fish near a large plant. It is believed that each method will result in a normal random variable that depends on the method. Test the hypothesis at the α = .10 level of significance that both methods have the same variance, if a given fish is checked 8 times by each method with the following data (in parts per million) recorded.

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Method 1 6.2, 5.8, 5.7, 6.3, 5.9, 6.1, 6.2, 5.7 Method 2 6.3, 5.7, 5.9, 6.4, 5.8, 6.2, 6.3, 5.5