SOLUTION: In U.S criminal trials, about 60% of all defendants are found guilty. a) if you were to observe 25 criminal trials, what is the expected number of guilty verdicts? b) how man

Question 887142: In U.S criminal trials, about 60% of all defendants are found guilty.
a) if you were to observe 25 criminal trials, what is the expected number of guilty verdicts?
b) how many trials would you need to observe in order to 96% certain of seeing a guilty verdict?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In U.S criminal trials, about 60% of all defendants are found guilty.
a) if you were to observe 25 criminal trials, what is the expected number of guilty verdicts?
E(x) = np = 25*0.6 = 15
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b) how many trials would you need to observe in order to 96% certain of seeing a guilty verdict?
P(0<= x <=?) >= 96
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? = 19
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Cheers,
Stan H.
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