SOLUTION: Use normal approximation to estimate the probability of getting more than 54 girls in 100 births. Assume that boys and girls are equally likely.

SOLUTION: Use normal approximation to estimate the probability of getting more than 54 girls in 100 births. Assume that boys and girls are equally likely.

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Question 1187845: Use normal approximation to estimate the probability of getting more than 54 girls in 100 births. Assume that boys and girls are equally likely.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
mean is np=50
variance is np(1-p)=25
sd is therefore 5, units girls
z> (54.5-50)/5, using continuity correction factor
z>0.9
That probability is 0.1841

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