Stat Question 4

#1
7. One of the major oil products companies conducted a study recently to estimate the mean gallons of gasoline purchased by customers per visit to a gasoline station. To do this, a random sample of customers was selected with the following data being recorded that show the gallons of gasoline purchased.
8.7 22.4 9.5 13.3 18.9
22 14.4 35.7 19 24.9
5.7 15.7 8.9 22.5 15.9

Based on these sample data, construct and interpret a 95% confidence interval estimate for the population mean. (6 points)