Construct a 98% confidence interval for 1 / 2 in Exercise 9.42, where 1 and
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Construct a 98% confidence interval for σ_{1}/σ_{2 }in Exercise 9.42, where σ_{1} and σ_{2} are, respectively, the standard deviations for the distances obtained per liter of fuel by the Volkswagen and Toyota minitrucks.
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