The weights of packages of' crackers follow a normal distribution with a mean of 15.2 oz and a (2 points) standard deviation of .5 02. If x-bar is the mean weight of an SRS of 7 packages of crackers, then x-bar has an 0' Exact normal distribution with 11:15.2 and 0:.2 Q Exact normal distribution with \"=1 5.2 and 52.4 (3' Approximate distribution with 14:15.2 and o=.2 0 Approximate distribution with t1=15.2 and o=.4 O Exact distribution with \"14.63 and o=l