A 95% confidence interval on the population mean amount of water used per household during the month of May in a city wa calculated to be 9422 gallons to 9930 gallons. Which of the following is an appropriate explanation of this interval?
a) We are 95% sure that most households use between 9422 gallons and 9930 gallons of water during the month of May in this city.
b) We know there is a 95% chance a household will use between 9422 gallons and 9930 gallons of water during the month of May in this city.
c) We are sure 95% of households in this city used between 9422 gallons and 9930 gallons of water during the month of May.
d) We are 95% sure the mean amount of water used per households in this city was between 9422 gallons and 9930 gallons during the month of May.