Each night after closing, a large busy restaurant refills all of the salt and pepper shakers at their tables . Each night on average they need about 0.5 liters of salt with a standard devotion of 0.1 liter and about 0.06 liters of pepper with a standard deviation of 0.02 liters. One night the restaurant used 0.6 liters of salt and 0.075 liters of pepper. Which was higher relative to other nights' usage