An automobile rental agency has the following mileages (in thousands) for a simple random sample of 20 cars rented last year. Given this information, and assuming the data are from a population that is approximately normally distributed, construct and interpret the 90% confidence interval for the population mean:

55 35 65 64 69 37 88 80 39 61 54 50 74 92 59 50 38 59 29 60 miles