You want to estimate the proportion of adults who make over $50,000 a year in your county. According to a study done two years ago, the proportion is. 18, and you suspect the proportion hasn't changed.
You need a margin of error of no more than ± 2%.
Which of these expressions would give you your minimum sample size?
A. n = AP Statistics Semester 2 Non-AP Pre-Calculus Semester 1.18 (1 -.18)
B. n = AP Statistics Semester 2 p (1 - p)
C. n = AP Statistics Semester 2
D. n = AP Statistics Semester 2
E. Can't be determined
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