Rolling a fair twelve-sided dio produces a uniformly distributed set of numbers between 1 and 12 with a mean of 6.5 and a standard deviation of 3.452. Assume that n twelve-sided dice are rolled many times and the mean of the outcomes is computed each time. a. Find the mean and standard deviation of the resulting distribution of sample means for n=144 The mean of the resulting distribution of sample means is . (Round to the nearest tonth as needed.)