8.21 Fear Factor In a survey of 1275 Canadians aged 18 and over conducted by EKOS Research, 69% of Canadians said they thought the world is more dan- gerous today than it was 25 years ago.4

a. Find a point estimate for the proportion of Canadian adults who fear that the world is more dangerous today than it was 25 years ago. Calculate the margin of error.

b. The poll reports a margin of error of plus or minus 2.7%. Does this agree with your results in part a? If not, what value of p produces the margin of error given in the poll?