Mileage tests were conducted on a randomly selected sample o

Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The average tread wear was found to be 51,327 miles with a standard deviation of 3,538 miles. What is the best estimate of the average tread life in miles for the entire population of these tires?

estimate of population mean is sample mean, i.e, 51327 miles