help me with this statisics problem! The RUSMRT, a new standardized math test , will be administered to all graduating seniors at Woodbridge High. The test has already been administered at many other high schools and the results have produced normal curves with standard deviations of 40. Woodbridge High has the opportunity to try this test out with 10 of its students, so they take an SRS of the seniors and record the following scores : 234, 355, 218, 308, 332, 281, 267 , 290, 299, 241 A. Construct and interpret a 90% confidence interval for the Woodbridge High average on this test. Use the 4 step process . B. Name and explain two ways that we could make this confidence interval narrower