1. According to an article in Travel & Leisure, an average plot of land in Spain's San Martin wine-producing region yields 600 bottles of wine each year.10 Assume this average is based on a random sample of 25 plots and that the sample standard devi- ation is 100 bottles. Give a 95% con?dence interval for the population average num- ber of bottles per  plot.

2. 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% con?dence interval for the daily fuel consumption.