The corrosion depths of four samples taken from a steel I beam are 95, 276, 129, and 268 mils. Assuming an interest in being 90% certain, use a confidence interval to decide whether or not the true variance could be as small as 2800 (mils)2. O Could be as small as 2800 (mils)^2. O O Could not be as small as 2800 (mils)^2. O