The auromatic hopper car loader is set to pur 86 tons of coal into each car. The actual weights of coal loader into each car are normally distributed, eith 86 mean tons and 1.4 ton syandard deviation. What is the probabiliry that one car chosen at random will have less than 85.5 tons of coal

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.