SOLUTION: Nine percent of men and 0.25% of women cannot distinguish between colors red and green. This is the type of color blindness that causes problems with traffic signals. Researchers n

Question 1181540: Nine percent of men and 0.25% of women cannot distinguish between colors red and green. This is the type of color blindness that causes problems with traffic signals. Researchers need at least 50 men with this type of color blindness, so they randomly select 600 men for a study of traffic-signal perceptions. Estimate the probability that at least 50 of the men cannot distinguish between red and green. (approximate in three decimal places)
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
normal approximation
mean is np=500*0.09=45
variance is np(1-p)=45*0.91=40.95
sd is sqrt(V)=6.400
want z >(50-45)/6.40, which is z > 0.781 with a probability of 0.217
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