A sample of $210$ sanitation workers for a city earns an average of \$24,375 per year. A record also shows that the standard deviation of all city workers’ income is \$823. What is the average income of all sanitation workers in the city? Conduct an estimate at $0.05 ~ \alpha$ level.
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1What have you tried? Mathjax will help you with your mathematical expressions. – Alain Remillard Mar 03 '20 at 19:14
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Is there any more specificity to the question? Otherwise the best estimate for the population mean is the sample mean. – user78090 Mar 03 '20 at 19:19
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have a look at confidence interval – Alain Remillard Mar 03 '20 at 19:37