The amount of water consumed each week by Montana

Last updated: 7/19/2022

The amount of water consumed each week by Montana residences is normally distributed. A simple random sample of 25 residences was taken with a sample mean of 120.3 gallons and a standard deviation of 10.0 gallons. Test the claim at the 0.10 SL that the average amount of water consumed is less than 125 gallons. Make sure to give the test-statistic and the p-value.