Question: Hybrid Vehicle Gas Mileage An automotive manufacturer believes that the variance of the gas mileage for its hybrid vehicles is 6. You work for an energy conservation agency and want to test this claim. You find that a random sample of the miles per gallon of 28 of the manufacturer’s hybrid vehicles has a variance of 4.25. Let a = 0.05.

Use the \({{\chi }^{2}}\) -test to find the standardized test statistic.