Multiple Choice
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?
A) 632.46
B) 40
C) 4,000
D) Cannot be determined.
Correct Answer:
Verified
Correct Answer:
Verified
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