SOLUTION: Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 183 eligible voters aged 18-24 are randomly selected. Suppose
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Question 1162359: Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 183 eligible voters aged 18-24 are randomly selected. Suppose a previous study showed that among eligible voters aged 18-24, 22% of them voted.
Probability that fewer than 44 voted Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Can use normal approximation
np=mean or 183*0.22=40.26
np(1-p) is variance or 40.26*0.78 or 31.40
sqrt(V)=sd=5.60
z=(43.5-40.26)/5.60 or 0.58
probability z < 0.58 is 0.7190