A study was completed in California. In northern California, the study involved 1,000 patients; 74% of them experienced flu-like symptoms during the month of December. The study had a margin of error of 3.2%. What does that mean for the study?

A: The confidence interval is between 12.1% and 236.8%.

B: The confidence interval is between 70.8% and 77.2%.

C: The confidence interval is between 67.6% and 80.4%.

D: The confidence interval is between 71% and 77%.

Question

A study was completed in California. In northern California, the study involved 1,000 patients; 74% of them experienced flu-like symptoms during the month of December. The study had a margin of error of 3.2%. What does that mean for the study?

A: The confidence interval is between 12.1% and 236.8%.

B: The confidence interval is between 70.8% and 77.2%.

C: The confidence interval is between 67.6% and 80.4%.

D: The confidence interval is between 71% and 77%.

jhonyy9 · Answer

any idea ?

jhonyy9 · Answer

how you think what mean this ,,3,2%" margin of error ?

Ferredoxin4 · Answer

Confidence interval for sample proportions:

CI = p̂±MOE
where
MOE = z*(SEp̂)

You have p̂=74%, and you have the MOE=3.2%, apply the formula and you should get your Confidence interval.