The research sta of Investors Now, an online finical trading rm, was interested in determining if there is deference in the variance of the maturities of AAA-rated industrial bonds compared to CCC-rated industrial bonds. A random sample of 17 AAA-rated bonds resulted in a sample variance of s2A = 123:35, and an independent random sample of 11 CCC-rated bonds resulted in a sample variance of s2C = 8.02. Perform a signicance test at the alpha = 05 level.