The number of years of education of self-employed individuals in the United States has a population mean of 13.6 years. If we survey a random sample of 100 self-employed people, with a sample standard deviation of 0.6 years, to determine the average number of years of education for the sample, what is the population deviation of the distribution o ? • a. 13.6 • b. 0.6 0 с. 6

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