Quarters are currently minted with weights normally distributed and having a standard deviation of 0.069. New equipment is being tested in an attempt to improve quality by reducing variation. A simple random sample of 23 quarters is obtained from those manufactured with the newequipment, and this sample has a standard deviation of 0.042. Use a 0.05 significance level to test the claim that quarters manufactured with the new equipment have weights with a standard deviation less than 0.069. Does the new equipment appear to be effective in reducing the variation ofweights?

Use the 2-test to find the standardized test statistic.