Calculate the true mean ? and true standard deviation ? of the census tract populations based on all the rows in the data file, which has information about all of the census tracts in the United States. Use the formulas or correction factors in your software for the population mean and standard deviation. (Round your answer to two decimal places.) ? = 4226.09 Correct: Your answer is correct. people ? = 1981.88 Correct: Your answer is correct. people Each tract has its own population size, but all the tracts combined have an average population size ?, which you calculated above. The bureau wants the ability to create accurate estimates of the average population size ? of its census tracts in the future without having to conduct an expensive full census during a non-census year. Instead, they want to perform population surveys over a sample of the census tractsl

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