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Crossett Trucking Company claims that the mean weight of its delivery trucks when they are fully...

Crossett Trucking Company claims that the mean weight of its delivery trucks when they are fully loaded is 5,250 pounds and the standard deviation is 160 pounds. Assume that the population follows the normal distribution. Forty trucks are randomly selected and weighed.

Within what limits will 95 percent of the sample means occur? (Round your z-value to 2 decimal places and final answers to 1 decimal place.)

Math   Statistics-And-Probability   
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