Problems 3 and 4

3. A sample of 60 faculty members at a large university found that their average taxes were $500 a month, with a standard deviation of $35. What is the 90% confidence interval (CI) and margin of error (ME) of the average taxes of all faculty members at the university? 4. Construct the 95% confidence interval (CI) and margin of error (ME) when given sample size , sample mean , and standard deviation