A random sample was selected from a population having a normal distribution. Calculate a 90% confidence interval estimate for u for the situations in parts a through d below. a. Ex= 144, n= 10, s= 3.3...

Extracted text: A random sample was selected from a population having a normal distribution. Calculate a 90% confidence interval estimate for u for the situations in parts a through d below. a. Ex= 144, n= 10, s= 3.3 The 90% confidence interval is (Round to four decimal places as needed. Use ascending order.)