Urgent 20
the weights of packages of crackers follow a normal distribution with a mean of 15.2 oz. and a standard deviation of .5 oz. if x-bar is the mean weight of a srs of 7 packages of crackers, then x-bar has an approximate distribution with mu equal to 15.2 and sigma equal to 0.2 exact normal distribution with mu equal to 15.2 and sigma equal to 0.4 exact normal distribution with mu equal to 15.2 and sigma equal to 0.2 approximate distribution with mu equal to 15.2 and sigma equal to 0.4 exact distribution with mu equal to 14.6 and sigma equal to 1