The bureau of Economic Analysis in the U.S. Department of Commmerce reported that the mean annual income for a resident in North Carolina is $18,688 with a standard deviation of 15,000. A researcher for the state of Sout Carolina wants to test the following hypothesis......
The researcher gathers information from a sample of 625 residents of South Carolina and finds a sample mean of 17,076 with a sample deviation equal to 15,500.
Trying to figure ou how t construct a 99% confidence interval for the value of te mean pertaining to the South Carolina resident's income.