1) A large urgent care center with 4 doctors found that they can see an average of 18 patients per hour. Assume the standard deviation is 3.2. A random sample of 42 hours was selected. Find the 99% confidence interval of the mean.

---

2) A credit company found the average value of assets (in millions of dollars) of 30 credit unions in southwestern Pennsylvania was 11.091. Assume the population standard deviation is 14.405. Find the 90% confidence interval of the mean.