A polling organization conducts a poll by making a random survey of 1250 people. Estimate the margin of error at a confidence interval of 95%.
A)1.25%
B)2.50%
C)2.83%
D)2.95%

Question

Quizplus · Accepted Answer

The margin of error at a confidence interval of 95% can be estimated using the formula: ME = 1.96 *sqrt(p*(1-p)/n), where p is the estimated proportion and n is the sample size. Since we don't have any information about the estimated proportion, we can use p = 0.5, which gives us ME = 1.96*sqrt(0.5*(1-0.5)/1250) = 0.0283 = 2.83%. Therefore, the best choice is C.

A Polling Organization Conducts a Poll by Making a Random