SOLUTION: Margin of​ error: seven percentage​ points; confidence level 90​%; from a prior​ study, ModifyingAbove p with caret is estimated by the decimal equivalent o
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Question 1121361: Margin of error: seven percentage points; confidence level 90%; from a prior study, ModifyingAbove p with caret is estimated by the decimal equivalent of 58%
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
CI 90% has z of 1.645
margin of error is +/- z*SE=0.07
1.645*sqrt(.58*.42/n)=0.07
square everything
2.71*.58*.42/n=0.0049
n=134.72 or 135
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