Raftelis Financial Consulting reported that the mean quarterly water bill in the united States is 47.50(U.S. News&report , august 12, 2002) Some water systems are operated by public utilities, whereas other water systems are operated by private companies. The concern is that consumers end up paying higher-than-average rates for water provided by private companies. The water system for Atlanta, Georgia is provided by private companies. A sample of 64 Atlanta consumers showed a mean quarterly water bill of 51$ with a sample standard deviatin of 12$. At a= .05, does the ATlanta sample support the conclusion that above-average rates eist for this private water system? What is your conclusion?