In a survey conducted by the Pew Research Center in 2010 41% of Americans support the legalization of marijuana in the U. S. The researchers note that the margin of error is ± 3% using 95% confidence. What does this margin of error tell you about the results of the survey?

A) We are 95% confident that the results are off by 3%.
B) 3% of the respondents gave a fake answer.
C) We can be 95% confident that the proportion of all Americans who support legalization of marijuana is within 3% of 41%.
D) We are certain that the proportion of all Americans who support legalization of marijuana is between 38% and 44%.


C