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Question 20 6 pts 25 observations are randomly chosen from a normally distributed population, with a known standard deviation of 80 and a sample mean of 250. What is the upper bound of a 90% Confidence Interval (CI)? Express your answer in two decimal places. Ask StudyBuddy Question 21 6 pts In a local community, assume ages are normally distributed. To estimate the average age of people in the community, a sample of 25 people are taken. The mean of these sample values is 52. The upper bound of the 90% confidence interval for the mean age is 61.6. What is the lower bound for the 90% confidence interval? Round your answer to one decimal place. Ask StudyBuddy Question 22