June is Nаtiоnаl Dаiry Mоnth, and in hоnor of that, let’s examine the distribution of a cow’s milk production. Milk production follows a normal distribution with a mean of 6 gallons and a standard deviation of 1.3 gallons per day. Using the 68–95–99.7 rule, 95% of the milk production is captured between a lower bound of [lower] and an upper bound of [upper].