Suppose we want to estimate the mean number of raisins per each 18.7 ounce box of Kellogg's Raisin Bran. If the standard deviation of the number of raisins per box, based on a limited sample, is 15.3 raisins, and we want to be 99% confident that our estimate for the mean is off by at most 3 raisins, how large a sample size should we take? We should sample _____ boxes. Question Blank 1 of 1