The data on the daily consumption of fuel by a delivery truck, in gallons, recorded during 25 randomly selected working days, are as follows:
9.7, 8.9, 9.7, 10.9, 10.3, 10.1, 10.7, 10.6, 10.4, 10.6, 11.6, 11.7, 9.7, 9.7, 9.7, 9.8, 12, 10.4, 8.8, 8.9, 8.4, 9.7, 10.3, 10, 9.2
Compute a 90% confidence interval for the daily fuel consumption.