A sample of 61 computer chlps were tested for speed in a certain application. The mean speed was * = 495 megahertz, with a standard deviation of 10 megahertz. Is it appropriate to use the methods of this section to construct a confidence interval for the mean speed of this chip? Yes No, because the sample size is too small and the sample does not indicate an approximately normal population. No, because we do not know the population standard deviation No, because the standard deviation is too high