Question: a researcher is evaluating a hypothesis for americans living in...
A researcher is evaluating a hypothesis for Americans living in rural regions of the United States: that the mean income among black Americans is lower than among white Americans. According to existing research data, white Americans in rural regions have a mean income of
44,685. The researcher conducted a simple random sample of 202 black heads-of-households in rural regions and found that their mean income was 40,896 (standard deviation=10,861.77).