<PRE><B>Question 251620</B>
mileage test are conducted on a randomly selected sample of 100 newly developed automobile tires. The average tread wear was found to be 50,000 miles with a standard deviation of 3,500 miles. What is the best estimate of the average tread life in miles for the entire population of these tires? 
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The best point estimate is the sample mean: 50,000
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Cheers,
Stan H.
a. 50,000
b. 3,500
c. 50,000/100
d. 3,500/100
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