Crossett Trucking Company claims that mean weight of its delivery trucks when they're fully loaded is 6,100 pounds and standard deviation is 135 pounds. Suppose that the population follows the normal distribution. Twenty trucks are randomly selected and weighed.
Within what limits will 99 percent of sample means occur? (Round your z-value to 2 decimal places and final answers to 1 decimal place.)
Sample means ________ to _____________