Asked by veedu
                if the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female.use the normal distribution to approximate the binomial distribution
            
            
        Answers
                    Answered by
            MathGuru
            
    Mean = np = 100 * 0.5 = ?
Standard deviation = √npq = √(100 * 0.5 * 0.5) = ?
Note: q = 1 - p
Finish the calculations, then use z-scores.
z = (x - mean)/sd
Note: x = 55
Determine the probability using the z-score and a z-table.
I hope this will help get you started.
    
Standard deviation = √npq = √(100 * 0.5 * 0.5) = ?
Note: q = 1 - p
Finish the calculations, then use z-scores.
z = (x - mean)/sd
Note: x = 55
Determine the probability using the z-score and a z-table.
I hope this will help get you started.
                    Answered by
            drew
            
    .1841
    
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