4. The Kaiser Family Foundation polled 1294 residents of Orleans Parish in New Orleans in 2008 and found that 41% of the residents who had lived through Hurricane Katrina in 2005 report that their lives are still disrupted².

a. The poll surveyed 1294 people. We need to find approximate margin of error for a 95% confidence interval?

b. The poll of 1294 people found that 41% of respondents still had disrupted lives. Can we conclude with certainty that no more than 45% of residents' lives are still disrupted, please show justification?

c. Supposing instead that the poll of 1294 people had found that 52% still had disrupted lives. Explain what we could conclude from this result. Could we assert with confidence that a majority of residents' lives are still disrupted by Katrina?

d. Supposing we wish to have a margin of error of two percentage points. Approximately how many people should we interview?