Question 1 A random sample of 400 people is taken from all people in a city. The ages of the sampled people have an average of 35 years and an SD of 20 years. Is the interval “33 years to 37 years” an approximate 95% confidence interval for the average age of the people in the city. Question 2 A random sample of 100 students is taken from among all students at a large school. The average height of the students in the sample is 66 inches and the SD is 2.5 inches. Construct an approximate 68% confidence interval for the average height of all students in the school.