The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. suppose we select a sample of 40 tires and use a simulator to determine the tread life. what is the standard error of the mean?

632.46

Step-by-step explanation:

The formula to calculate the standard error is given by :-

Given : The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles.

i.e.

Also, sample size : n=40

Then standard error of the mean will be :-

no one knows lol

step-by-step explanation:

mark has $52

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