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Mr. James Lynch conducts a study to find that the average time people wait in line before they can talk to a clerk at the
Mr. James Lynch conducts a study to find that the average time people wait in line before they can talk to a clerk at the DMV office . The study involved 25 customers. The average was 45 minutes with a standard deviation of 12 minutes.
a) Find a 95% confidence interval for the true mean time that customers have to wait in line
b) Find a 99% confidence interval for the true mean time that customers have to wait in line
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