SOLUTION: Use the normal curve to make the estimates requested. The census from a certain year revealed that 22.8% of the U.S. veteran population were disabled. In a random selection of

Question 1131810: Use the normal curve to make the estimates requested.
The census from a certain year revealed that 22.8% of the U.S. veteran population were disabled. In a random selection of 100 veterans, estimate the probability that 30 to 40 of them were disabled. (Round your answer to three decimal places.)
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
np=mean or 22.8
np(1-p) = variance or 22.8*0.772=17.60
sd= sqrt (V)=4.2
correction factor want mean between 29.5 and 40.5
z=(29.5-30)/4.2 or -0.12
z=(40.5-30)/4.2 or +2.5
probability z is between those values is 0.542

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