Banking fees have received much attention during the recent economic
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 30 customers paid an average fee of $ 12.55 per month on their interest bearing checking accounts. Assume the population standard deviation is $ 1.75.
a. Construct a 95% confidence interval to estimate the average fee for the population.
b. What is the margin of error for this interval?
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