(a.) you want to determine if the lives are lognormally distributed in order that you can establish the design life for a probability of failure of 0.001 (0.1 percent). plot the data as log of life versus plotting position using mean ranks using the probability paper supplied on blackboard. are the data lognomally distributed? predict what the design life would be from your plot for 0.1%. mean ranks: (b.) what are the mean and standard deviation from your plot in both log units and in cycles?