Solve the problem.In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was properly conducted and that the 1000 people surveyed represent an unbiased sample of the entire population. Compute a 95% confidence interval (expressed using percents) for this survey.
A. 84.8% to 85.2%
B. 82.8% to 87.2%
C. 84.08% to 85.02%
D. 81.7% to 88.3%
E. 83.9% to 86.1%
Answer: B
Mathematics
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