SOLUTION: Ricardo was conducting an experiment . if his experiment resulted with a success rate of 65% and a standard deviation of five ,at least how many trials did he conduct?

SOLUTION: Ricardo was conducting an experiment . if his experiment resulted with a success rate of 65% and a standard deviation of five ,at least how many trials did he conduct?

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Question 1143264: Ricardo was conducting an experiment . if his experiment resulted with a success rate of 65% and a standard deviation of five ,at least how many trials did he conduct?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
np=mean
np(1-p)=variance and sqrt(np(1-p)) is std dev.
variance is 25
n(0.65)(0.35)=25
.2275n=25
n=109.89 or 110.
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