In the following sample size formula, what percent level of accuracy is desired? n= 2.28^2* (90x10)/5^2

In the following sample size formula, what percent level of accuracy is desired?
n= 2.28^2* (90x10)/5^2




A) 0%
B) 5%
C) 9%
D) 3%
E) 0.025


Answer: b


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