What limits will ninety nine percent of sample means occur


Crossett Trucking Company claims that the mean weight of its delivery trucks when they are fully loaded is 6,000 pounds and the standard deviation is 145 pounds. Assume that the population follows the normal distribution.Twenty trucks are randomly selected and weighed. Within what limits will 99 percent of the sample means occur?

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Basic Statistics: What limits will ninety nine percent of sample means occur
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