The weights of bags of pet food are distributed normally about the mean, 50 lb. The standard deviation is 0.2 lb. In a group of 20 bags, about how many would you expect to be within one standard deviation from the mean?
With a normal distribution, we can expect that no more than 5% of the values fall within one standard deviation of the mean. Those in the 5% may have up to 50.02 or 49.98 pounds of pet food.
